Gabriel Jesus will be assessed in the coming days to determine the extent of a hamstring injury picked up during Arsenal’s 2-1 win at Sevilla, as Mikel Arteta admitted the forward’s second-half substitution was “not good news”. Jesus scored a spectacular goal and set up Gabriel Martinelli’s opener in the victory in Spain, which saw the Gunners take control of their Champions League group. But the Brazilian’s fitness is now a major concern ahead of a key run of games in Arsenal’s season. The Gunners host Sheffield United on Saturday before they face trips to West Ham in the Carabao Cup and Newcastle in the Premier League next week. Jesus was substituted in the second half of the Champions League win, having been holding his hamstring moments before the board was held up showing his number. Speaking after the game to TNT Sports, Arteta admitted the injury had prompted the substitution, saying it was “worrying” and that Jesus would be assessed in the next few days to discover the extent of the injury. "He felt something in his hamstring so let’s see,” Arteta said. “He straight away asked to be subbed which is not good news because he’s not a player that does that at all so we’ll have to wait and see in the next few days.” Arsenal’s victory put them top of Group B on six points, with Lens now in second on five points after their 1-1 draw with PSV Eindhoven. Read More Sevilla vs Arsenal LIVE: Latest Champions League updates Mikel Arteta hopes to be talking about football after Arsenal’s trip to Sevilla Mikel Arteta pinpoints moment Arsenal made ‘phenomenal’ response at Chelsea