Barca could clinch the title as early as Wednesday should Atletico Madrid lose to Valencia, and if that doesn't happen then a win at home to Levante on Saturday will be enough.
Find out how all of the action unfolded courtesy of Sports Mole's minute-by-minute updates below.
The end of the campaign is in sight now and surprise package Alaves still have the prospect of European football to fight for, although to achieve that they will need to end a run of form which has seen them fail to win any of their last five games. Barcelona, by contrast, would move to the brink of another La Liga title should they win tonight and could have it sewn up by tomorrow night should they win and Atletico then lose to Valencia.
Kickoff is only five minutes away, so let's have a look at the team news before we get started...
SUBS: Garcia, Twumasi, Martin, Guidetti, Sivera, Brasanac, Marin
SUBS: Cillessen, Arthur, Messi, Vermaelen, Lenglet, Alba, Malcom
Alaves and Barcelona remain goalless, with the visitors enjoying 77% possession but failing to make the breakthrough yet. Barca's best moments came in the opening 10 minutes, but since then they have struggled to break down the Alaves defence.
Aside from that there have only really been half-chances for Barcelona from Suarez, Vidal and Coutinho, and the visitors do seem to be missing the individual magic of Messi.
As long as the scoreline remains 0-0 the hosts are very much in this game and it only takes one set piece or one chance for them to set up a shock against the champions-elect.
Roberto plays a one-two on his way in from the right flank before feeding a pass into the box. Suarez cleverly dummies it to let it run through to Alena, who makes no mistake to tuck his finish into the bottom corner.
Goals from Carles Alena and Luis Suarez were enough for Barcelona to beat Alaves this evening, and if Atletico Madrid lose to Valencia tomorrow then the title is Barca's - if not then a home win against Levante on Saturday will wrap it up for Valverde's side.
Thank you very much for joining Sports Mole for tonight's La Liga contest as Barcelona move to within one result of the La Liga title courtesy of victory over Alaves. I will leave you with our match report, and be sure to stick around for reaction too.
From me, though, it is goodbye for now!