Manchester United midfielder Owen Hargreaves risks missing their Champions League semifinal against Barcelona with a hamstring strain.

The Daily Mail says it was after the Arsenal game that Hargreaves felt the top of his right hamstring stiffen up and, as of Thursday afternoon, the problem had shown no sign of easing concerns over Rio Ferdinand and the Brazilian Anderson, but both are expected to be fit on Saturday.

Central defender Nemanja Vidic also has a good chance of playing after making a good recovery from a knee injury picked up in Rome a little over two weeks ago.