Roger Federer has 2⃣nd highest winning% among GS male champs w at least 8 singles GS🏆 and at least passed their 38th birthdays ( Björn Borg 1st w 8⃣2⃣.7⃣%). 3. Jimmy Connors 4.Ivan Lendl,5.Henri Cochet, 6.Bill Tilden, 7.Max Decugis, 8. Rod Laver. At the age of 3⃣8⃣, Roger Federer is 1⃣st better than Ken Rosewall, Bill Tilden, Roy Emerson, Henri Cochet, Rod Laver, Max Decugis, Jimmy Connors.