Wayne Rooney and Nemanja Vidic are both major doubts for Manchester United's Champions League semi-final second leg against Barcelona after missing training on Monday.

The pair both suffered injuries during Saturday's 2-1 Premier League defeat at Chelsea and have less than 36 to recover in time for Tuesday's game at Old Trafford.

Vidic was left groggy and bloodied with a split lip after an accidental collision with Didier Drogba in the first half, while Rooney appeared to injure his hip in the act of scoring United's equaliser.

If Rooney is out, Alex Ferguson will have little option but to deploy Carlos Tevez as a lone striker supported by Cristiano Ronaldo.

If Vidic misses out, Ferguson may once again deploy Owen Hargreaves as a makeshift right-back with Wes Brown in central defence. Mikael Silvestre and John O'Shea are also available.

Tevez, Hargreaves, Cristiano Ronaldo, Patrice Evra and Paul Scholes are all expected to return to the starting XI after sitting out the weekend fixture.

Alex Chick / Eurosport