Romelu Lukaku tied the game for United in the 76th minute.
Manchester United's Premier League title hopes have been diminished for a while with Manchester City dominating things at the top of the table, but United's hope of finishing second received an unexpected boost on Monday.
"I've had a lot of coaches and they all had different thoughts and obviously differing tactics", said Aguero.
Against Newcastle and Crystal Palace, they continuously carried a nervousness in their centre-back pairing though United dominated possession.
Mourinho continued: "In the first half Alexis (Sanchez) was on the left, in the second half he was behind Lukaku". We're talking about a supposed world class player. "We gambled a little bit with a two against two at the back without Matic's protection in front of them".
"After the second goal it was very hard for us to come back; we showed character and did exactly what the manager wanted us to do".
"We believed until the end and we did exactly what the manager wanted from us".
"I'm happy to score my first goal, I know it's not my job but I'm happy to score and happy that we won the three points".
The steward looked down the camera and realised he had made a big mistake on live TV.
Chris Smalling says Manchester United's dramatic comeback at Crystal Palace was reminiscent of the Sir Alex Ferguson era.
Asked about the momentum gained ahead of the Liverpool game, he said: "I think it has teed up perfectly that we have gone above them again". Antonio Valencia picked him out with a fine cross from the edge of the area and, under minimal pressure, he headed the ball back across Palace goalkeeper Wayne Hennessey and into the back of the net.
"His great strength is that he plays with freedom and like he's playing on the park with his mates and it's like everyone he does is like a YouTube or an Instagram video", Neville added.