Arsenal could be set for an injury blow ahead of the first leg of their Champions League play-off clash with Celtic at Parkhead on Tuesday night.
The Gunners have injury doubts over Bacary Sagna, Cesc Fabregas and Denilson, with captain Fabregas given only a 50-50 chance of playing.
Sagna took a knock in Saturday's 6-1 win over Everton while Denilson (groin) and Fabregas (hamstring) will also be assessed before the game, although midfielder Abou Diaby has recovered from a groin injury.
England forward Theo Walcott is still out with a back complaint and defender Johan Djourou (knee) remains on the sidelines, as Arsenal look to progress to the lucrative group stages of Europe's biggest club competition with a depleted squad.
Manager Arsene Wenger, however, has claimed that Arsenal can cope with the 'special noise' at Celtic Park.
Although Celtic have a terrible record away from home in Europe, the fans have proved the difference for the Scottish team at home - as they have pulled off some incredible results, including holding Manchester United to a 1-1 draw and beating AC Milan 2-1 in recent years.
But Wenger told the club's official website: "Scotland is always a very special atmosphere, a special noise in the stands. But we have played everywhere in Europe and we can deal with that. It will be down to us and how well we play.
"We don't go into this game with fear. We go with respect for Celtic, but we know it is a very important game for us and we want to come home with a positive result.
"I always prepare my team first with determination and not with fear. We have played everywhere and have good experience in the Champions League. But every game is different and we know what we will face on Tuesday night - a very determined Celtic team with quality."