Arsenal boss Arsene Wenger insists there's no long-term fitness concerns for Theo Walcott.

"There is a slight concern but we believe it is a question of days and not of weeks," Wenger said.

"We will see [if he is fit to face United next Saturday]. It is always difficult to set a date. I thought he would be available for Celtic, I thought he would be available for Everton, but he wasn't. That's why we will be cautious."