Dutchman was forced out of friendly early on with the problem.
Manchester United face an anxious wait to discover the full extent of the injury picked up by key front man Robin van Persie in their friendly with Yokohama F-Marinos in Japan on Tuesday, reports the Daily Mail.
The prolific Netherlands international was forced out of the first half of the warm-up fixture with the Japanese outfit, which the Red Devils lost 3-2, after suffering a problem in his thigh, and with the Premier League champions’ title defence set to get under way in less than a month’s time against Swansea City at the Liberty stadium, new United head coach David Moyes will be praying that Van Persie is able to recover in time for the trip to South Wales.
“We’ve got a couple of wee worries,” confirmed Moyes after the defeat, his second already in charge of United.
“Robin just felt his thigh in the first half and we didn’t want to take any chances.”
And the Scot has every reason to be concerned about the Dutchman’s fitness after the debut campaign that Van Persie enjoyed in the north west last season following the striker’s hugely controversial £22.5 million move from Arsenal last August.
The 29-year-old managed to net an incredible 30 goals in just 48 matches in total for United last time out, including an equally eye-catching 26 strikes in only 38 Premier League contests, and Moyes will therefore want Van Persie back to full fitness as soon as possible as he looks to get his managerial career at United off to the best possible start.