Paul Clement praised his Swansea City players for fighting back to draw with Manchester United after the blow of conceding from a controversial first-half penalty.
Captain Wayne Rooney scored from the spot after Marcus Rashford went to ground following a challenge from goalkeeper Lukasz Fabianski, with television replays highlighting that there was barely any contact.
"My players clearly thought it wasn't a penalty and, seeing the replay the player has deceived the referee," he told BT Sport. "It's clear. There's no other way to look at it.
"The ref [Neil Swarbrick] seemed to have some doubts because there was a big delay and I spoke to him afterwards and he said he was only receiving confirmation from his assistants. It was a mistake. He went down way before there was contact."
He added to BBC Sport: "The players were very frustrated and angry after that penalty decision at half-time, but we re-focused in the dressing room on what we had to do.
"That is arguably a clean sheet today and we go into the next game against Everton fully believing that we can stay in this league for next season."
