The England striker missed Saturday's win over Wolves with an inflamed kneecap tendon after playing two games at Wembley last week.
United boss Sir Alex Ferguson criticised the state of the pitch after his side's Carling Cup win over Aston Villa and England's friendly victory against Egypt.
But, according to The Sun, the Scot should be able to welcome 24-year-old Rooney, who scored twice in the 3-2 first-leg win in the San Siro, back to face the Italian giants on Wednesday.
Up and at them: Rooney heads home United's third goal in Milan
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