The Red Devils cruised to a 3-0 win but Mourinho felt they took their foot off the gas
But Mourinho accused his players of indulging in too many tricks when 2-0 up and taking their foot off the gas.
“We made bad decisions,” said Mourinho.
“Fantasy football, Playstation football, tricks – and when you stop to play as a team and when you stop to play seriously, I don’t like and you gamble a little bit.
“Probably the players felt that the game was under control with the 2-0 lead, but football is football and you have to respect your opponent.
“Until 2-0 we played it very stable, with confidence, with patience, with good choices and we played, I’d say, quite well. After the 2-0 I think everything changed and we stopped to play, stopped to think and stopped to play seriously.
“We stopped to make the right decisions on the pitch and we could put ourselves in trouble, but they didn’t score and the third goal came.”
The Frenchman suffered a hamstring injury and was replaced by Fellaini after just 18 minutes.
By experience, just from looking and feeling it, I think it’s a hamstring,” said Mourinho. “Big? Small? I don’t know, but a hamstring for sure.
“Squads are for this, squads are for injuries, squads are for suspensions. We don’t cry with injuries.
“So if no Paul for Sunday, we have Ander Herrera, we have Michael Carrick, we have Fellaini and we have Nemanja Matic.”