The Bianconeri won the match, after a free kick goal by Del Piero.
Legrottaglie said: “We have to praise Zenit because in all my years as a player I have rarely been so impressed with an opposition team.
“In fact at one point I told Giorgio Chiellini that we should be happy if it ended 0-0.
“But then I must also compliment Juventus, as it shows our quality and tenacity that we were able to beat this Zenit side and to keep a clean sheet.”
