Manchester United fought back from two goals down to earn a dramatic 3-2 win against Newcastle at Old Trafford on Saturday.
The Magpies were two goals up within ten minutes after Kenedy and Yoshinori Muto found the back of the net. The Red Devils reduced the deficit with a brilliant Juan Mata free-kick in the 70th minute before Anthony Martial's strike in the 76th made it 2-2. However, Sanchez came off the bench to score the winning goal as United bounced back to winning ways.
Mourinho said as BBC Sport reported: "Marcus Rashford was sad on the pitch, Scott McTominay was scared on the pitch. Even older players commit mistakes that are not normal.
"At half-time we had a good conversation. We didn't promise that we would win the match. We promised we would give absolutely everything without any fear, without any pressure, just the pressure of giving everything and of course they gave everything.
"We fought so much. They deserve even if the game ends 2-2. The feeling would be a positive feeling because nobody can promise to win matches."
Manchester United registered their seventh Premier League win after being two or more goals down at half-time - four more than any other team.