Manchester United striker Dimitar Berbatov has been ruled out for two weeks

Manchester United striker Dimitar Berbatov has been ruled out for two weeks with an ankle injury.

The Bulgarian suffered the problem in the 2-0 defeat at Fulham two weeks ago and will now not feature in Sunday's clash against Aston Villa.

The 28-year-old is also likely to miss both legs of the Champions League quarter-final against Porto and next weekend's league trip to Sunderland.

Berbatov withdrew from Bulgaria's recent World Cup qualifying matches.

With fellow striker Wayne Rooney also missing because of suspension, manager Sir Alex Ferguson is waiting for the return of Carlos Tevez after Argentina's 6-1 loss to Bolivia in their World Cup qualifying match.

Aston Villa's Gabriel Agbonlahor could be recalled to the starting line-up after being left out of the first team for the Liverpool clash before the international break.

With John Carew and Emile Heskey selected in attack for that 5-0 defeat, Agbonlahor is likely to get the nod with Heskey struggling with a hamstring problem picked up after scoring for England in midweek.

Left-back Wilfred Bouma - out for eight months with a dislocated ankle - is unlikely to be risked, despite coming through a third reserve game in midweek with no ill effects.