Best percentage in a season in Grand Slam
Best percentage in a season in Grand Slam
| Rank | Player | Percentage | Wins | Total | Year |
|---|---|---|---|---|---|
| 1 |  Jimmy Connors | 100.00% | 20 | 20 | 1974 |
| 2 |  Novak Djokovic | 96.43% | 27 | 28 | 2015 |
| 3 |  Roger Federer | 96.43% | 27 | 28 | 2006 |
| 4 | Roger Federer | 95.65% | 22 | 23 | 2004 |
| 5 | Ivan Lendl | 95.24% | 20 | 21 | 1986 |
| 6 | John McEnroe | 95.24% | 20 | 21 | 1984 |
| 7 |  Bjorn Borg | 94.74% | 18 | 19 | 1979 |
| 8 | Roger Federer | 92.31% | 24 | 26 | 2005 |
| 9 | Jimmy Connors | 91.67% | 11 | 12 | 1976 |
| 10 |  Jannik Sinner | 86.67% | 13 | 15 | 2026 |