"I'm happy I've scored my first goal for Manchester United, I know it's not my job but I'm glad it got us the three points", said the 29-year-old.
Crystal Palace: Wayne Hennessey (out of 10) 6, Aaron Wan-Bissaka 6, Martin Kelly 6, James Tomkins 6, Patrick van Aanholt 7, Andros Townsend 7, Luka Milivojevic 6, James McArthur 6, Jeffrey Schlupp 7, Christian Benteke 6, Alexander Sorloth 6.
At that stage, Palace looked good for a first Premier League win over United in 18 attempts, only for another comeback by Mourinho's men, a week after they came from a goal down to beat Chelsea. "Some days more than others, but after Smalling's goal, I always thought it was possible". We had an incredible attitude and very good quality football in the second half but we made so many defensive mistakes and I am not only speaking about my defenders.
"I can not tell you half of the things I told my team at half-time because there would be lots of bleeping on television", Mourinho said.
Both clubs are also targeting European glory, with Liverpool reaching the Champions League quarter-finals after a 5-0 aggregate win over Porto while United face Sevilla in the return leg of their last 16 clash on Tuesday having drawn 0-0 away.
"I can't criticise any player for the effort they made or their discipline tactically".
Palace remain in the relegation zone, one point from safety, but Eagles boss Roy Hodgson urged his players not to let the heartbreaking defeat influence their fight for survival.
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".
Speaking after last night's game, Matic told Sky Sports: 'I think that we are improving.