Paris  - Never-shy John McEnroe has seized the moment of Roger Federer's Miami misery, producing an offer of coaching help in French media.

The 50-year-old legend and noted self-promoter told the Le Journal du Dimanche weekly that he would be available for coaching or other duties - on a limited basis, naturally.

"I'd like to help Roger," said Mac, adding: "He needs to change his strategy if he wants to beat (Rafael) Nadal - and I have an idea about that.

"I can't see myself accompanying a player all year long but it could be really interesting to help out from time to time."

It's the same offer McEnroe used a few years ago when Australian Mark Philippoussis was on his last legs.

Federer fell into a funk with a racket smash at the Miami Masters after losing a lead and a semi-final against Novak Djokovic, who faces Andy Murray in the Sunday title match.

The Swiss number 2 has stalled on 13 Grand Slam singles titles, leaving himself one short of the all-time best of 14 held by former Mac rival Pete Sampras.

McEnroe is convinced that with proper guidance, Federer can snap back to winning form. "I think he'll beat Pete's record, but it won't be easy to become number 1 again (from Nadal)."

Federer has lot to Nadal at both the Wimbledon and Australian Open finals over the past nine months. (dpa)