Jose Mourinho says Paul Pogba suffered a later injury
Pogba was expected to start in central midfield for Manchester United against Liverpool but the France midfielder was not included in the squad when teams were announced.
It was then reported that the 24-year-old had suffered a gash to his leg in training.
Speaking after the 2-1 win over Liverpool, Mourinho had his BBC interview interrupted by Pogba, who shook his hand.
Mourinho then revealed Pogba got hurt very late in Friday's session.
He said: "He was injured in the last minute of the last training session before the game. Incredible.
EPA
Marcus Rashford scored twice for Man Utd
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"If I finished the training session one minute before he would have been OK."
Mourinho then reserved special praise for Rashford, who scored twice and young midfielder Scott McTominay.
He added: ”Marcus Rashford and McTominay - one scored two goals, special for a kid who feels the shirt in a special way because he was born here.
"McTominay played with such class and maturity. He really impressed me because the crowd can push with their hearts and even when they were pushing him to do the wrong thing, he did the right thing."