The Italian outfit were beaten 2-0 at the Camp Nou by a Barca side missing Messi through injury, with Rafinha and Jordi Alba the scorers in a comfortable win for the Blaugrana.
The voting processes ends on Friday, but claims have been made that Messi believes a final match-winning performance could sway the award in his favour.
He has travelled with the squad to Milan without the all-clear from the club's medical team.
They sit three points ahead of the Italians at the top of Group B having won each of their three fixtures.
Perhaps it will depend on how much Barca need him and, in that respect, messi's absence has been less pronounced than many predicted 15 days ago when he tumbled and broke his right arm against Sevilla.
"He could play at the start, come off the bench, not play at all ... everything is possible".
Spice Girls set to tour without Victoria Beckham
Speaking on UK TV show "Loose Women", she said: "It's just the four of us, but she might join us at some point". It was previously announced that she would not be joining her former bandmates for their comeback tour.
Suarez, who scored a hat trick in last week's drubbing of Real Madrid, completed the comeback three minutes later by arriving at the far post to steer in a cross from Sergi Roberto, striking a fifth goal in two games and a ninth in total to move top of the league's scoring charts. More than anything because he is one more [player] and so we have more to choose from.
"Maybe more aggresive because they're at home".
"We want Luis to keep this run going, of course, but we're also looking forward to Leo coming back". His is the shirt that children who dream of being footballers ask for", said Spalletti, "but Barcelona have shown that even without him, they still have the mentality to develop their game, which is what makes the difference.
"It will be hard because they're a courageous team with a way of playing that I love".
"It's a match that, in the event of a win, would qualify Barca automatically as group winners".