Arsenal have been dealt a major injury blow ahead of Saturday's trip to Manchester United with the news full-back Hector Bellerin has been ruled out for four weeks.

Bellerin sustained the problem in the closing moments of the 1-1 draw against Tottenham on November 6 and subsequently withdrew from the Spain Under-21 squad.

Gunners manager Arsene Wenger, speaking at his news conference on Thursday, confirmed the defender was set for a spell on the sidelines.

He said: "Hector is out for four weeks, he got injured in the last 10 seconds after a strong challenge from Danny Rose."