Becker won his first of three Wimbledon titles 20 years ago when he was aged just 17 and has worked as a BBC pundit at the Championships since retiring.
He will be there again next week and believes the generation of players to follow Federer has already started to come through.
Becker said: "His main challengers this year will be Hewitt, Henman and Andy Roddick.
"They are the establishment and you have another group coming, so it is an exciting time for tennis.
"Rafael Nadal is by far the best player of this generation. Looking back there have been other young players such as Stefan Edberg, John McEnroe, Federer, and I was not bad.
"Nadal is among that league and will eventually learn to play on grass. He is not there yet but he is not a pushover either."