The three points put the Blaugrana right back in title contention, but few had given them a chance in the lead up to La Liga's biggest game.
Birmingham City footballer Peter Lovenkrands was one of those who had predicted a home win:
Barca welcome back four old boys in the shape of on-loan Rafinha Alcantara, Nolito, Andreu Fontas and manager Luis Enrique.
With the former being in particularly good form per WhoScored.com, the home side need to be on their toes to avoid a loss that would render the Clasico win irrelevant.
Date: Wednesday March 26
Time: 7 p.m. GMT/3 p.m. ET
TV Info: Sky Sports 4 (UK), beIN Sports 1 (US)
Unlike in the Premier League, returning loan stars are often able to play against their parent clubs in La Liga.
Barcelona may well regret affording Celta Vigo the courtesy of allowing Rafinha Alcantara to play in this one, as the combative midfielder has been the visitors' best player this season.
According to Jen Evelyn of Inside Spanish Football, he is just the sort of player the Catalans will require in their midfield next season:
The stand-out performances throughout the campaign have made Rafinha a transfer target for clubs in England, some of which are reportedly willing to pay his buy-out clause of £30m, but the one that may need him the most next season is Barcelona itself.
Rafinha has played practically everywhere on the pitch this season.
Mainly known as an attacking midfielder, he has also impressed on the right flank.
The player has been praised for his versatility and ability to unlock defenses with dribbles—much like his Barcelona idol Andres Iniesta—and the praise has been well deserved.
Celta will surely be looking to their stand-out performer to pull the strings in this one, but against the likes of Xavi Hernandez, Iniesta and Sergio Busquets, Thiago's younger sibling will certainly have his work cut out.
Especially if fellow midfielders Augusto Fernandez and Borja Oubina don't provide the cover required when the youngster looks to impose his natural game upon the proceedings.
Since the turn of the year, Messi has only failed to score or provide an assist in four matches, and in the last 10 games he has notched 15 goals.
Andreu Fontas will have a point to prove upon his return to Camp Nou, but if Tata Martino has done his homework, he will have his players targeting Fontas' central defensive partner David Costas.
Per WhoScored, Costas has been one of Celta's worst performers when he has pulled on the shirt. Jonny too, on the left side of defence, has failed to make much of an impression.
If Pedro is given the nod by Martino ahead of Neymar, then expect the Spaniard to get at the left-back for a significant part of the game.
It really could be a long 90 minutes for the away side because Barcelona's home form speaks for itself. Real Madrid TV's Phil Kitromilides noted the same via his Twitter account:
With just that one loss since the start of the season, you would be hard pressed to bet against them extending their record in this one.