Arsenal hero Martin Keown says Anthony Martial should be concerned about his Manchester United place.

United face arch-rivals Manchester City tomorrow (12:30pm) in what potentially could be an explosive showdown at Old Trafford.

But Keown thinks Martial could be forced to make way and drop to the bench.

“It would be very harsh to drop anyone after such an excellent start to the season, though if anyone could be in trouble I would think maybe Anthony Martial has the most to worry about," Keown told the Daily Mail.

“He's very talented and had a brilliant first season at Old Trafford, but he hasn't contributed too much this term and it was he who Rashford came on for before scoring the late, late winner against Hull."