Former Arsenal defender Martin Keown rapped Samir Nasri for failing to hold the line in Manchester City's wall for Robin van Persie's Manchester United winner.

Keown wrote in the Daily Mail: "There were two errors with the wall. Tevez walked off the end to close down Wayne Rooney on the edge of the box, but he should have stayed and reacted if necessary.

"And Samir Nasri is not the bravest. What was he doing in the wall? We often put people there who can't do much defensively - such as pick up attackers or block. But he hid. If he stands up tall it hits him and bounces clear."