Roy Keane was left unimpressed with Mourinho's latest complaints.
Mourinho is concerned by United's fixture list.
Pogba has a hamstring problem.
Rostov takes a 1-1 draw from the Europa League first leg to Old Trafford.
Jose Mourinho complained about Rostov's pitch.
The Frenchman has been criticized for recent performances.
United travels to Stamford Bridge on Monday.
Wayne Rooney has not traveled to Russia.