Sprint champ Usain Bolt has told Sir Alex Ferguson to keep together his Manchester United midfield pairing of Darren Fletcher and Michael Carrick.

Bolt will be watching tomorrow's Carling Cup final against Aston Villa tomorrow.

Bolt told The Sun: "Whenever Michael Carrick and Darren Fletcher are together in midfield, I feel much better.

"I also prefer two up front rather than Wayne Rooney on his own - even though he has done very well in that role this season.

"The problem is who the other striker should be because Dimitar Berbatov hasn't done it. We need him to step up. We were looking for big things from him but he has been disappointing.

"Our back four has been the main problem, though. We might play five games well and when it comes to the next important one we mess up.

"If Nemanja Vidic and Rio Ferdinand were playing together, we would be all right but, unfortunately, that isn't happening."