Jack Wilshere has been ruled out of Arsenal’s Champions League match against Anderlecht on Tuesday night through illness.
Wilshere has been nursing a knee injury and has not played since the Gunners beat Anderlecht 2-1 in the reverse fixture in Belgium 12 days ago.
The 22-year-old is now sick and will not be involved in the game at the Emirates although Arsene Wenger expects him to recover in time for Arsenal’s trip to Swansea on Sunday.
Wenger has not decided whether to start Theo Walcott, who made his first appearance since January 4 following a cruciate ligament injury against Burnley on Saturday.
Arsenal could seal qualification to the knock-out stages with two games to spare if they beat Anderlecht and Borussia Dortmund also overcome Galatasaray.
“If we can seal qualification I would describe the feeling as satisfied to have the job done,” Wenger said.
“We respect Anderlecht because they gave us a tough game and we had a bit of a miraculous win because we needed to go until the last minute but that was as well our quality in the game.
“We have been warned and now we want to win the game again at the Emirates.”
Since beating Anderlecht, Arsenal have recorded consecutive Barclays Premier League wins over Sunderland and Burnley, scoring five goals and conceding none.
Alexis Sanchez starred in both victories, bagging twice in each game, and Wenger believes the Chilean is starting to show his best form for the club.
“I believe he had a difficult start to integrate with the team – it was not easy for him to adapt to us and us to him,” Wenger said.
“Now he is showing how good he is. I believe what you want from every top player is not just individual quality but also a fighter.
“He shows that in every game – the header he scored (against Burnley) is a fantastic goal, not just because of the quality of the goal but because of the desire and determination as well.”
Sanchez has seven goals and two assists in the league already this season but his energy, fitness and work rate have been equally impressive.
Arsenal captain Mikel Arteta added: “Playing with somebody like Alexis is easy and nice because it makes our job easier when you have a player likes him in form scoring goals and playing well for the team.
“The way he looks after people around him and the work he does every game is something we need to highlight because his goals, assists and tricks get more attention but his work is important as well.”