"Everyone knows how much I feel connected to this club and the fans," he told talkSPORT. "At this moment it's difficult for us to play at home, because playing here is like playing in an empty stadium.
"The team then starts playing like it's a quiet, soft game at home. It's difficult to get that strong start where the players, team and fans at Stamford Bridge [are all together].
"I was today looking around and it was empty, but not in terms of people because it was obviously full. That's what frustrating."
Mourinho had no issues with his team, however, whom he feels deserved to win the game.