Juventus coach Max Allegri defended his tactics for their stalemate with Champions League opponents Atletico Madrid.
The 0-0 draw was enough for both teams to progress.
"It's always complicated against Atletico, as they defend very well with tight lines, so it's not easy to find passes between the lines," Allegri told Sky Sport Italia.
"We risked on a few occasions, Buffon did very well in the first half with a save and we had chances too. In the second half we tried to win, but at the same time not risk losing. We didn't want to compromise a qualification I thought was thoroughly deserved, as we did not deserve to lose against Olympiacos and Atleti in Madrid.
"Of course we need to improve, as against these big clubs there are times when you have to defend and protect yourself - something Atletico Madrid do for most of the game."
