Former Manchester United fullback Paul Parker believes Jose Mourinho's team could be found out by Southampton on Friday night.
Parker wasn't convinced by United's win at Bournemouth on Sunday.
Parker, speaking exclusively to 888Sport, said: “It's going to be a tester for Manchester United because Southampton are going to be more clever in the final third than Bournemouth. In midfield they will move the ball around quicker so we'll find out then how Herrera and Fellaini do when they don't have the ball.
"Whether they can close down and break up play. We'll also see how isolated Ibrahimovic gets. Bournemouth was a false storm and all about getting the three points."
Read the full 888sport interview with Paul Parker, including his thoughts on United's lost identity under Mourinho.