Manchester City boss Pep Guardiola urged calm after their 1-0 defeat at Tottenham for the first-leg of their Champions League quarterfinal.

Heung-min Son's goal separates the two teams going to Manchester.

Spurs had survived the concession of an early penalty, awarded on a pitchside video review by the referee after Danny Rose was judged to have handled Raheem Sterling's shot. Sergio Aguero stepped up, but keeper Hugo Lloris saved.

Guardiola said: "There are always key moments in football. It is the Champions League and the result is what it is.

"We played well and we were controlling the game. We had our chances with the penalty so it was a good performance but it is the Champions League and that is the challenge."

On Sergio Aguero's penalty miss: "Next time we will score. Now we have to prepare for Crystal Palace. We do not have time to think about Tottenham."