Sissoko has urged Tottenham to accept and move on quickly from their "painful" 2-1 defeat to Leicester.
"There is a lot of frustration, but we need to accept it, even if it is painful because we have another game on Tuesday," Sissoko said to Spurs TV.
"Even if it is a cup game, we have to be focused on that game (now).
"We need to work hard and analyse what went wrong (at Leicester) and move on.
"We don't have time to think too much because we have to recover as soon as possible and be ready for Tuesday if we want to have a good game and win.
"There is a lot of frustration, but we need to move on."