Federer and Nadal are the top two players in the world and have won 37 Grand Slam titles between them.
But Martin thinks Novak Djokovic is more technically gifted and he would go down as the greatest of all time if he had not been damned with injuries.
The Serbian added Grand Slam No 13 to his name at Wimbledon earlier this month, which put to bed a nightmare 12 months that included surgery on an elbow problem.
But before his recent issues, Djokovic won four major tournaments in a row to end the long-running dominance of Federer and Nadal.
https://www.express.co.uk/sport/tennis/992802/Roger-Federer-Rafael-Nadal-Todd-Martin-Novak-Djokovic-Mats-Wilan
I caught Todd's act last week at Newport. He likes to bloviate. You know who plays similar to Joker, though to a lesser degree? David Ferrer, who lost to a young German yesterday. Their game is more defense than anything else. That style ages very badly, but we'll see. Between that "heavy D" style of play, and the bulging eyes, on-court vertigo and hissy fits, I truly doubt he'll end up with the slam record or "goat" crown. And, all the assss-licking, and PC phony he can muster -- and that's a sheet-load -- won't help him.