Juventus coach Max Allegri was left frustrated despite their Europa League win at Freiburg.

Juve won 2-0 thanks to goals from Angel di Maria and a penalty from Dusan Vlahovic to reach the quarterfinals.

"It was important to get through to the next round, we did well in the first half, but need to improve when we are leading and have an extra man," a clearly irritated Allegri told Sky Italia.

“We have to make better choices when we are on the ball. We lowered our intensity and concentration levels, making life difficult for ourselves. Whether they had 10 men or 11, it shouldn't change anything."

On Vlahovic, Allegri added: “I am pleased for the psychological aspect of the goal, but again we need to improve on that second half performance. We cannot make mistakes like that on the choices and the passing channels. It's just not good enough.

“There were two or three situations, then the icing on the cake was Wojciech Szczesny's long ball for Moise Kean. These are situations we need to improve, but it also depends on the characteristics of our strikers. Aside from Di Maria, they are all basically counter-attacking specialists."