Chelsea manager Jose Mourinho says his team deserved to win the game against Watford in the FA Cup.
The Blues produced a below-par performance in the first half but shrugged it off after the Portuguese opted to involve striker Diego Costa and midfielder Willian in the second half.
And Mourinho, who left Cesc Fabregas, Nemanja Matic and Eden Hazard out of the starting line-up, says that a tired-looking Diego Costa was still capable of making the difference for the hosts.
"It was difficult," Mourinho said.
"In the first half we didn't play well and Watford were well-organised defensively. The second half was different, we gave a different dynamic to the game. We created and we deserve to win.
"I don't need to be angry to try to change things. I did the changes that I thought could help me change the dynamic of the game. Diego Costa and Willian played very well and in the second half the team followed them.
"If I don't have on the bench players which can help me change the game, probably I don't win.
"A tired Diego, with 90 minutes of Southampton and 90 minutes of Tottenham, changed the game."
