The Egyptian midfielder scored his side's only goal of the game in the 3-1 loss.
The Egyptian midfielder has seen limited game time since joining from Basel in the January transfer window.
Recent weeks have seen his game time increased significantly though with a number of starts in the Gunners midfield.
The latest of those was against Barcelona in the Champions League, in which he got his side’s only goal of the game and his first for the club in a 3-1 defeat.
And he admits he was pleased with his display, adding that his team must now turn their focus to the Premier League title race.
“I'm happy with my performance, but not that happy about the result. I knew it'd be hard, but there is no 'hard' in football,” he told arsenal.com.
“We did what we could. Sure, we lost, but we tried our best. We were playing against a big team.”
“We're still up for the league. We need to focus. We still have nine games to go and God willing we can do it.”
Whether Arsenal can actually compete for the title now however, remains to be seen.
With just nine games remaining they find themselves 11 points behind Leicester City, which looks like being too big a gap to make up given how the Foxes are playing.
Indeed, it looks like Claudio Ranieri’s side will be fighting it out with Tottenham Hotspur for the crown given the gap both have on their rivals.