In the Open Era, Borg has 5 straight Wimbledons, while Federer and Sampras each have 4 titles in a row. The other Slams don't have these stretches of domination by one player. The longest streak at the U.S. Open is 3 titles, held by McEnroe, Lendl and Federer each. No one has won 3 straight Australians. Borg had 4 in a row at the French, but no one else has even 3 (and that goes for the entire history of the championships at Roland Garros). There seems to be a similar pattern on the women's side in the Open Era. Navratilova won 6 straight Wimbledons. The next-best streak at any of the Slams is Chris Evert with 4 at the U.S. Open (of which 3 were on clay). Any ideas on why this might be?