Mikel Arteta lauded the impact Gabriel Jesus has had on his Arsenal side since he signed after his team’s win over Sevilla.
Jesus assisted and then scored as Arsenal won 2-1 to ensure his side sit top of their Champions League group at the halfway point.
But the forward was replaced late on with what looked to be a hamstring injury and Arteta admits he is concerned.
“Big games are for big players,” Arteta said.
“He needed to produce those moments to win in a stadium like this. He’s done it for us in a really big way.
“Then, really sad because he felt something in his hamstring and I’m worried about that.
“He came here for a reason. I think he changed our world. He brought so much belief and energy to that team. He needs to step in in those moments. He’s done that.
“That’s when a player becomes accountable for the team. We need those players to win games. If you want to play Manchester City, then go to Stamford Bridge, then come here – that’s the level we’re at right now.
“He has been through a lot in the last few years and he’s still really young. He has enormous experiences – some of them not the nicest but very necessary to be the player that he is today.
“I’m really happy to have him in the team.”