The midfielder told talkSPORT: "Everyone in the dressing room is very disappointed and we know have to win these types of games.
"It's difficult to talk after a game like this. I didn't think we started too badly but we didn't create too many chances. In the second half we didn't play that well.
"There are some tough games coming and we'll do everything to win these games. The positive thing is that we have another match coming very quickly but it's not going to be easy against Forest."
Spurs face Nottingham Forest in the League Cup on Wednesday.