Juan Mata admits slow starts are having a serious impact on Manchester United's season.
The Red Devils blew their chance of finishing top of their Champions League group after losing 2-1 to Valencia on Wednesday.
Carlos Soler scored Valencia's first after 17 minutes and Mata recognises United have a problem with starting games on the front foot.
"It seems like we always push in the last minutes, when players come off from the bench or the players that are on the pitch," Mata said.
"It seems like we react in the last 10, 15 minutes and start creating more chances and getting closer and closer to score. That is what we did today but it was not enough.
"We are disappointed because obviously it's more painful knowing that Juventus lost and if we had have won we would have finished first in the group.
"It was special for me personally coming back to Valencia and feel the love of the club and the supporters, so I am grateful for that, but disappointed overall. We reacted a bit too late."