Juventus boss Massimiliano Allegri admits they need to score in Monaco after victory in the first-leg of their Champions League quarterfinal.

Arturo Vidal's penalty was the only goal to separate the two teams.

"Overall I think the result is deserved. Obviously, it's a quarter-final, so anyone who thought we'd win 3-0 was kidding themselves. They have the strongest defence in the Champions League and Ligue 1.

"I am always optimistic, but we know that we need to score in Monaco to go forward. This is a tough side to play against and paradoxically it was easier against Borussia Dortmund because of their style of football.

"Monaco know their limitations and therefore play to stop the opposition playing. It means waiting a little longer and making an extra five or six passes to find the right breakthrough.

"It's only normal there was pressure around this game, especially as we were the favourites, but we were too hasty and therefore made simple mistakes with our passing. In these situations, you must always have the patience and calm to play your game."