Lazio coach Vladimir Petkovic says his squad still has room for improvement.

Petkovic led Lazio to Coppa Italia glory on Sunday.

"Making an evaluation is always risky because you need to look at the development of the season. I am very satisfied, but I'm never 100 per cent happy and I always try to improve.

"The experience this season has brought us peace of mind and consciousness. As I have said, I have felt that our efforts should be rewarded in some way, we've had some dark moments, but all in all, when we were able to work seven days a week without commitments in midweek, the results have come."