Dembele tries to tee up Suarez in the box, but he overhits his lofted pass and Alvarez is able to gather.
The referee ends the contest.
90'
There will be one minute of added time.
87'
I. Rakitić has scored a goal for Barcelona! Assist by O. Dembélé.
Dembele curls a good ball into the box and Rakitic rewards the quality by heading home.
GOALLLLLLLL!!!!!! BARCA HAVE FIVE! The home side notch their fifth goal as Dembele lifts the resulting corner into the box and Rakitic is afforded a free header 10 yards from goal. The midfielder picks his spot and finds the top corner. A composed effort from Rakitic.
86'
BLOCK! Suarez sends Dembele into the right inside channel and Rakitic makes a run from deep. The Frenchman fires a low cross towards the near post, but Rakitic's effort with a backheel is diverted behind for a corner by Sergi Gomez.
83'
Barcelona are keeping their foot on the ball to take time off the clock. There's no need to do anything extreme now.
81'
Mendez raids down the left and he fires a cross into the box, but Vermaelen is on hand to divert the ball behind for a corner. The referee turns down muted appeals for a penalty.
79'
CLOSE! Suarez is in behind the Celta defence and he spots Alvarez off his line. The striker tries to lob the keeper, but the ball drifts just wide of the post. So close for the Uruguayan.
76'
The objective now from Celta is to avoid further humiliation. They've been well and truly outplayed this evening, although facing Barca and Real Madrid in back-to-back matches is bound to take its toll.
74'
Barca move the ball well in the final third before Rakitic goes for the strike, but he blasts his effort well wide of the target.
73'
Arnaiz - who scored in the first leg - latches on to Busquets ball over the top and tries to fire at goal from a tight angle, only to smash his effort into the side-netting.
Minute
Description
72'
Suarez is desperate to add to his tally tonight and he surges into the box once more, but he cannot beat the challenge of Sergi Gomez, who stops the Uruguayan in his tracks.
69'
BLOCK! Dembele speeds forward with menace into the box and he cuts the ball back to shoot on his left foot, only to see his effort diverted behind by Mallo.
68'
Barca win a corner down the right, but the Celta defence clear the first cross into the box. Busquets sends a pass out to the left flank for Suarez and he goes for goal, only to fire straight at Alvarez.
67'
OVER! Semedo has space to raid down the right and he sends a cross to the near post. Suarez meets the ball first time to guide an effort at goal, but he blazes his strike over the bar.
65'
Gomes breaks into the final third with Barca, but his pass into the feet of Suarez is cut out by Sergi Gomez and the visitors are able to see off the threat.
63'
José Arnaiz enters the game and replaces Andrés Iniesta.
Arnaiz replaces Iniesta for the home side.
Maxi Gomez breaks free of the Barca defence down the left inside channel. He cuts past the challenge of Vermaelen and shapes to shoot, but Semedo gets back to make the vital challenge.
60'
As expected the tempo of the game has dropped in the second half. There's time for Celta to try to bring some respectability to the scoreline.
59'
O. Dembélé enters the game and replaces L. Messi.
Messi is withdrawn for Dembele.
57'
Brais Méndez enters the game and replaces P. Sisto.
Mendez replaces Sisto for the visitors.
Rakitic releases the run of Suarez and he tries to round Alvarez, but the offside flag is up as he fires at goal. That's not the first time that's happened to the Uruguayan this evening.
56'
Suarez weaves his way into the box and almost finds space to shoot, but he and Messi both get crowded out before they can fire at goal.
53'
WIDE! Semedo threads a throughball into the path of Suarez in the right inside channel. The striker reaches the ball on the stretch, but can only guide his effort wide of the target.
52'
Alba collects in the final third and tries a backheel to release Suarez, but Mallo makes the interception.
49'
OVER! Mor leads a counter on the right flank before he cuts inside to shoot on his left foot from the edge of the box. However, he fires his effort well over the bar.
Cillessen releases the run of Suarez behind the Celta defence. The Uruguayan fires a low cross into the box, but Fontas reacts to divert the ball behind for a corner.
47'
Mor leads a breakaway for the visitors, but the attack comes to nothing as Sisto carries the ball out of play for a goal-kick.
46'
T. Vermaelen enters the game and replaces Piqué.
N. Radoja enters the game and replaces D. Wass.
M. Gómez enters the game and replaces Iago Aspas.
Maxi Gomez comes on for Aspas to lead the line.
Radoja comes on for Wass for the visitors.
Vermaelen replaces Pique at the break.
We're back underway at the Camp Nou.
45'
OFFSIDE! Gomes threads a pass through to Suarez in the right inside channel and he fires into the bottom corner. However, the striker was offside when he latches on to the Portuguese's pass.
The referee ends the first half.
43'
WIDE! Celta break down the right and Mallo lifts a cross to the back post. Wass heads the ball into the path of Aspas, who tries an ambitious overhead kick at goal, only to fire well wide of the post.
41'
Aspas and Mor combine in the final third, but latter's cross is cleared with ease by Pique in the box. Celta have offered almost nothing in terms of a threat against the Barca goal.
38'
A loose ball in the Barca half interests Aspas for a second, but Pique reacts to steer a pass back to Cillessen to clear the danger.
36'
Barca are taking their time with their approach play. The game is hand now and Valverde can even afford to withdraw Messi should he wish to for the second half.
34'
OFFSIDE! Suarez latches on to a great pass from Mascherano at the back pot. He stretches to prod the ball towards the net from a tight angle, but is denied by the post. However, he was offside anyway, although he disagrees with the decision.
33'
Celta are all over the place at the back, and only a last-ditch challenge from Jonny stops Messi from firing home in the box.
31'
L. Suárez has scored a goal for Barcelona!
GOALLLLLLLLL!!!!!!!!!!!! SUAREZ FIRE HOME! The Uruguayan is handed a gift from Sisto as he intercepts his pass back to Alvarez, hammering his effort first-time past the Celta keeper from close range. This could get out of hand for the visitors.
28'
Jordi Alba has scored a goal for Barcelona! Assist by L. Messi.
Messi continues his superb outing with a pinpoint pass to the back post for Alba to score.
GOALLLLLLLLLL!!!!!! ALBA GETS ON THE SCORESHEET! The Barca defender scores the third goal of the evening for the home side, but it's all down to Messi. The Argentine arcs a spectacular ball behind the Celta defence into the left inside channel. Alba slides to make contact and his effort has the power and the accuracy to beat Alvarez at the back post.
26'
WIDE! Messi threads the needle to guide a headed pass into Suarez in the right inside channel. He tries an acrobatic effort at goal, but Alvarez watches it safely past the post.
24'
Celta have space to break on the counter as Aspas makes a run, but the home side quell the opening before they can threaten the edge of the box.
23'
Iniesta's delivery from the corner almost falls for Suarez at the near post, but the visitors clear before the striker can pounce.
22'
OVER! Messi threads the ball through to Iniesta to strike inside the box, but the ball takes a slight deflection before heading just over the bar. Alvarez may also have got a touch to turn it over to deny the Spaniard.
21'
WIDE! Messi raids forward with menace and he feeds Suarez on the edge of the box. He goes for the outside pass to Gomes, but his delivery is poor and Fontas clears. Rakitic seizes on the loose ball and hammers an effort at goal, but he blazes his effort wide of the target.
19'
Suarez attempts to pounce on a loose ball from Sisto in the Celta half, but the referee brings play back for a foul on the midfielder.
17'
Just like that Messi has taken the tie away from the visitors. The speed and movement of the Barca attacks is far and away a step up from the first leg when the Argentine and Suarez were absent.
15'
L. Messi has scored a goal for Barcelona! Assist by Jordi Alba.
GOALLLLLLLLL!!!! MESSI AT THE DOUBLE! The forward notches his second goal of game finishing a flowing move. He sends the ball out to the left flank for Alba's run and the Spaniard plays it straight back to him to strike beyond the reach of Alvarez. A fine team goal from Barcelona - that should wrap up the tie.
Alba makes another good run down the left and he sends a first-time pass back to Messi to fire home.
13'
L. Messi has scored a goal for Barcelona! Assist by Jordi Alba.
GOALLLLLLLLLLLL!!!!!! MESSI PUTS BARCA AHEAD! The Argentine fires a low volley that bursts through the hands of Alvarez to find the bottom corner. Alba created the opening with a surge down the left and he fired a low cross into the box. Messi hammered the ball towards goal first time and the effort appeared to surprise Alvarez so much so it powered through his hands and into the net. Not the best keeping from the Celta man.
Alba raids down the left and fires a low cross into the box for Messi to hammer past Alvarez.
12'
CLOSE! Wass raids down the right and fires a low ball towards the near post. Aspas attempts to steer an effort towards goal, only to be denied by a good challenge from Mascherano.
10'
Busquets wins a challenge in the final third and Messi seizes possession. The Argentine goes for the strike from 25 yards, but Alvarez makes a comfortable save.
9'
The home side win a corner on the left flank and Iniesta swings the ball into the box, but the Celta defence are able to clear the danger.
7'
Iniesta releases the run of Messi over the top of the Celta defence. He slides a pass to Suarez, who goes for the return to the Argentine, but Fontas makes the interception.
6'
Barca have started the match on the front foot and putting the visitors under a great deal of pressure at the back.
5'
Alba breaks down the left and sends a low ball into the box, but Sergi Gomez is there to clear the danger.
4'
Messi sends the ball wide for Gomes to lift into the box. He lifts a cross into the box, but the ball sails inches over the head of Suarez.
2'
Messi seizes on a loose ball in the final third and drives into the area, but a good challenge from Mallo stops his progress.
1'
We're underway at the Camp Nou.
Good evening and welcome to the live commentary of the Copa del Rey round-of-16 clash between Barcelona and Celta Vigo at the Camp Nou.
The tie is evenly balanced after the first leg as the teams played out a 1-1 draw. Jose Arnaiz put Barca ahead, only for Pione Sisto to equalise. Neither side could find another breakthrough, leaving both teams with work to do tonight to advance to the quarter-finals.
The team news has been announced and we'll start with the home side.
Lionel Messi, Andres Iniesta and Luis Suarez were rested for the first leg of the tie, but Valverde recalls his big guns for the second leg. Jasper Cillessen returns between the sticks after taking his place back on the bench against Levante. Javier Mascherano and Nelson Semedo start in the back four after missing out at the weekend.
HALF-TIME: BARCELONA 4-0 CELTA VIGO
Barcelona have taken complete control of the tie and are 45 minutes away from reaching the quarter-finals of the Copa del Rey. Lionel Messi has been outstanding in the opening 45 minutes, scoring twice and setting up Jordi Alba for his side's third goal. A mistake from Pione Sisto allowed Luis Suarez to score a fourth. It would take somethign special for Celta Vigo to come back from this deficit.
Barcelona returned to LaLiga action after the winter break at the weekend and recorded a comfortable win over Levante. Lionel Messi, Luis Suarez and Paulinho all got on the scoresheet to compound their advantage at the top of the table. Ernesto Valverde now turns his attention to the Copa del Rey, a competition in which they are determined to retain the trophy.
Celta Vigo did Barcelona a favour in their LaLiga clash, holding Real Madrid to a 2-2 draw at the Estadio de Balaidos. Daniel Wass put the home side ahead, only for Gareth Bale to respond with a brace. However, Maxi Gomez scored late on to secure a point for Unzue's men.
Unzue has made six changes to the side that drew against Madrid at the weekend. Sergio Alvarez starts in goal, while Sergi Gomez and Fontas come into the backline. Stanislav Lobotka and Jovabad Sanchez start in the middle of the park, while Emre Mor replaces Maxi Gomez leading the line alongside Iago Aspas.
FULL-TIME: BARCELONA 5-0 CELTA VIGO (AGG 6-1)
Barcelona power their way into the quarter-finals of the Copa de Rey this evening, putting five goals past Celta Vigo. The match was over by half-time as Lionel Messi scored a brace, whie Jordi Alba and Luis Suarez also found the net. Ivan Rakitic added a late goal to compound the visitiors' woes.
Thanks for joining our commentary this evening. Until next time, goodbye.
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