Originally Posted by tudwell
I'd say the person with the most potential to do it is someone in the future, who's not 25+ and will come in to dominate the game after Federer, Nadal, Djokovic, and Murray are all 30+ or retired.
If any player who's going to challenge Roger's records, it would be someone at least 19 or 20 years old coming on the scene and start making noise.
Tier1(goat): Federer; Tier 1.5: Laver, Sampras, Nadal, Borg;
Tier 2: Lendl, Connors, Rosewall; Tier 2.5: McEnroe, Agassi