Wayne Rooney admitted he had been given a "new lease of life" under David Moyes as his performance inspired Manchester United to a much-needed Champions League win at home to Real Sociedad.
The England international, who had looked set to leave Old Trafford this summer after falling out with Sir Alex Ferguson, created the only goal in the 1-0 win, which was turned into his own net by Inigo Martinez.
Ferguson, now a director at Old Trafford, talked about his relationship with Rooney, laying bare his fitness concerns for the player, in his autobiography published this week, but the striker said he was not fazed by the comments.
Rooney said on Sky Sports 2: "I haven't seen him since he retired. I'm happy under the new manager.
"The new coach that has come in (has given me) a new lease of life, I'm really enjoy working under David Moyes."
Asked if he would respond to Ferguson's comments, he said: "No, I'm happy playing football. That's the past, I'm looking to the future."
On the match, Rooney said: "I thought we played some great football. We should have won the game three, four or five, but I'm happy we got the win, that's most important.
"We defended well, a clean sheet is always pleasing. We created a lot of chances and on another day we will take them and win the game more comfortably."
Rooney celebrates his 28th birthday on Thursday and added: "I do (feel in my prime), I feel good, feel fit."
Moyes was full of praise for his striker's performance.
He said: "He was absolutely terrific tonight, he was great.
"We just want top players like Wayne to play well and he is playing well."