Manchester United manager Jose Mourinho is "talking rubbish" by complaining about the club's fixture schedule, says former captain Roy Keane.
United beat FC Rostov on Thursday to reach the quarter-finals of the Europa League but lost Paul Pogba to injury.
Mourinho said "fatigue has a price" and they will "probably lose" Sunday's game at Middlesbrough which kicks off at 12:00 GMT - a fourth game in 11 days.
Keane said: "Why do we have to listen to that garbage?"
After drawing the first leg in Rostov 1-1 last Thursday on a pitch the Russian Premier League have now said is too bad to be used, United played with 10 men for nearly an hour of their 1-0 FA Cup quarter-final defeat by Chelsea after Ander Herrera was sent off at Stamford Bridge.