Arsenal boss Mikel Arteta has hailed goalscorer Gabriel Jesus after victory over Sevilla.
Gabriel Jesus scored one and created the other for Gabriel Martinelli in their 2-1 Champions League win in Spain.
Arteta later said, "He came here for a reason; he changed our world. He's brought so much belief and energy to the team, and he needs to step into those moments. That's why he played, and he's done that. That's when a player becomes accountable to the team, and the team relies on those players to win games.
"We need players like this. You want to play, go to Manchester City, then come to Stamford Bridge, then coming here; that's the level we are at right now. To come here and win, it's a big credit to the boys."
On Gabriel Jesus' European experience, Arteta also said: "For sure he's been through a lot in the last few years and he's still really young. He has enormous experiences, and some of them, while not the nicest, they've been necessary to [shape] the player he is today. I'm really happy to have him in the team."
The striker has confirmed he will undergo a scan on his hamstring today.
Arteta also said: "Big games for big players, and he needed to produce those moments to win in stadiums like this. He's done it, and obviously, he opened the game for us in a great way. And then, we're really sad because he felt something in his hamstring, and he had to come off and I'm worried about that."