Gallas told Prime Casino: "Barcelona have looked very strong from the beginning of the season, and they’re in the last four of the Champions League. Barcelona are my favourites to win it, but at this stage of the competition, it's almost 50-50. Anyone can win it. That’s why Arsenal against PSG will also be 50-50.
"With PSG, even if they play very well, they’re missing a certain something. When we saw them against Aston Villa in the last match, they were hanging on and it told me that this is still a team that has flaws. Maybe PSG miss experienced players, but they’re a good team. They're playing great football, and we know it's a different PSG.
"They've got rid of the superstars, but they still have some brilliant players. But there's doubts. There's still a little doubt. They're a bit flaky, like when Aston Villa started banging in the goals against them in the last round. I thought to myself, we've seen this before. I thought PSG were different. So that's why it will be a little bit different with Arsenal, because Arsenal are stronger than Aston Villa. If Arsenal score first, it could be a great night for the Gunners."