United boss Sir Alex Ferguson has tried to credit the goal to Carlos Tevez, but Rocha told O Jogo: "I didn't expect him to hit the ball so far out. He's a friend of mine and I never would've thought he'd have gambled so far away from goal.
"But the strike had great pace and actually moved in the air. It was a great goal and all the credit must go solely to Nani."
Rocha added: "Everyone on the field congratulated him after the game. He was the best player. I tried to catch up with him in the dressing rooms afterwards, but was unable to."