Manchester United midfielder Darren Fletcher has admitted he is 'concerned' about the prospect of the English champions starting the season without Wayne Rooney.
The Scotsman, who is still battling his ulcerative colitis condition, is worried that United will be considerably weaker if Rooney is allowed to leave Old Trafford for London.
The striker has been linked with Chelsea but the Red Devils announced they had rejected a second bid from the Stamford Bridge club, which was reportedly worth £30million.
Fletcher, 29, said: "You do worry he might leave because he's a fantastic football player.
"Me personally, I hope he stays because he has been fantastic for Manchester United and a big part of all we have achieved in the last nine, 10 years I have been in the squad."
Rooney, hasn't travelled to Sweden with the United squad for their pre-season match against AIK Stockholm tonight after he picked up a shoulder injury in a behind-closed-doors friendly with Real Betis on Saturday, adding to the speculation he is leaving Manchester.
The England international also pulled out of the team’s pre-season tour of the Far East and Australia with a hamstring problem.
Meanwhile, the Premier League champions have struggled to stamp their authority on the transfer window and have yet to make a big-name signing.
United have had several bids for Barcelona's midfielder Cesc Fabregas rejected and have now turn their attentions to Real Madrid's Luka Modric, despite being told the playmaker is not for sale at any price.
Fellow title contenders and rivals Manchester City and Chelsea have both splashed the cash in the window. Fernandinho, Jesus Navas, Alvaro Negredo and Stevan Jovetic have joined the Sky Blues for a reported combined fee of £87million, while Jose Mourinho has brought in six-new players to the Bridge, including Andre Schurrle and Marco van Ginkel.
But Fletcher is not worried about the lack of activity in the United camp: "If we don't sign anyone I fully believe we have the capabilities in the squad to achieve the success we want," he said.
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