Fair comparison, though Pete was far more consistent than Serena ever has been. Steffi is greater no doubt, but both are great champions and I think if they played in the same generation, w/ both being consistently healthy and motivated, they both would win their fair share with neither one dominating the other.
You’re assuming Serena will be as fit as Graf, consistent as Graf, motivated as Graf, and play as much as Graf are nothing but "if" and "but". Serena is going to be the same person regardless if she play in any era, and competing against Graf, Martina or anyone else. I don’t think she will be as successful or as dominant as Graf. No way.
Most GS titles
player total
1
Steffi Graf 22
2 Martina Navratilova 18
2 Chris Evert 18
4
Serena Williams 13
5 Margaret Court 11
6 Monica Seles 9
7 Billie Jean King 8
8 Justine Henin 7
8 Evonne Goolagong Cawley 7
8 Venus Williams 7
Most GS finals
Rank Name Total
1 Chris Evert 34 (18 )
2 Martina Navrátilová 32 (18 )
3
Steffi Graf 31 (22)
4 Evonne Goolagong 18 (7)
5
Serena Williams 16 (13)
6 Venus Williams 14 (7)
7 Monica Seles 13 (9)
8 Margaret Court 12 (11)
8 Martina Hingis 12 (5)
8 Billie Jean Moffitt 12 (8 )
Most single titles
Rank Player Singles
1 Martina Navratilova 167
2 Chris Evert 157
3 Steffi Graf 107
4 Margaret Court 92
5 Evonne Goolagong Cawley 68
6 Billie Jean King 67
7 Lindsay Davenport 55
8 Virginia Wade 55
9 Monica Seles 53
10 Hingis 45
Most weeks at #1
Rank Player weeks
1 Steffi Graf 377
2 Martina Navratilova 332
3 Chris Evert 260
4 Martina Hingis 209
5 Monica Seles 178
6 Justine Henin * 117
7 Lindsay Davenport 98
8
Serena Williams * 111
9 Amélie Mauresmo 39
10 Dinara Safina * 26
Consecutive weeks at #1
1 Steffi Graf (1) 186
2 Martina Navratilova (1) 156
3 Chris Evert (1) 113
4 Steffi Graf (2) 94
5 Monica Seles (1) 91
6 Martina Navratilova (2) 90
7 Steffi Graf (3) 87
8 Martina Hingis (1) 80
9 Chris Evert (2) 76
10 Martina Hingis (2) 73
Year end No. 1 players
player year
Steffi Graf 8
Martina Navratilova 7
Chris Evert 5
Lindsay Davenport 4
Justine Henin 3
Martina Hingis
Monica Seles
Serena Williams 2
Jelena Jankovic 1
All surface single winning percentage
Rank Player Wins Losses Win %
1 Margaret Court 593 56 91.37
2 Chris Evert 1309 146 89.97
3 Steffi Graf 902 115 88.69
4 Martina Navratilova 1442 219 86.82
5 Monica Seles 595 122 82.98
6
Serena Williams*[1] 462 98 82.5
7 Justine Henin* 503 109 82.18
8 Billie Jean King 695 155 81.76
9 Evonne Goolagong Cawley 704 165 81.01
Clay court singles career winning percentage
Rank Player Wins Losses Win %
1 Chris Evert 316 20 94.05
2 Steffi Graf 273 30 90.1
3 Justine Henin* 122 19 86.52
4 Monica Seles 142 25 85.03
5 Martina Hingis 109 25 81.34
6 Martina Navratilova 202 47 81.12
7 Gabriela Sabatini 196 49 80
8 Venus Williams* 127 35 78.4
9 Lindsay Davenport 120 35 77.42
10 Conchita Martinez 294 88 76.96
Hard court singles career winning percentage
Rank Player Wins Losses Win %
1 Steffi Graf 335 36 90.3
2 Chris Evert 304 37 89.15
3 Martina Navratilova 340 48 87.63
4 Monica Seles 311 59 84.05
5
Serena Williams* 294 57 83.76
6 Justine Henin* 243 53 82.09
7 Kim Clijsters* 256 56 82.05
8 Maria Sharapova* 197 45 81.01
9 Venus Williams* 320 76 80.81
10 Lindsay Davenport 472 115 80.41
Grass court singles career winning percentage
Rank Player Wins Losses Win %
1 Martina Navratilova 305 39 88.66
2 Chris Evert 184 25 88.04
3 Venus Williams* 68 10 87.18
4
Serena Williams* 52 8 86.67
5 Steffi Graf 85 15 85
6 Maria Sharapova* 52 10 83.87
7 Justine Henin* 45 10 81.82
8 Jana Novotna 79 21 79
9 Kim Clijsters* 40 11 78.43
10 Tracy Austin 43 12 78.18
Carpet court singles career winning percentage
Rank Player Wins Losses Win %
1 Martina Navratilova 516 58 89.9
2 Steffi Graf 189 23 89.2
3 Chris Evert 209 39 84.3
4
Serena Williams* 34 7 82.93
5 Martina Hingis 97 23 80.83
6 Kim Clijsters* 50 13 79.37
= Monica Seles 98 26 79.03
8 Lindsay Davenport 93 27 77.5
9 Tracy Austin 85 25 77.27
10 Venus Williams* 50 17 74.63
Most singles matches won
Player Wins
1 Martina Navratilova 1442
2 Chris Evert 1309
3 Steffi Graf 902
4 Virginia Wade 839
5 Arantxa Sánchez Vicario 759
6 Lindsay Davenport 753
7 Conchita Martínez 739
8 Evonne Goolagong Cawley[5] 704
9 Billie Jean King 695
10 Gabriela Sabatini 632
Most match winning streak(all surfaces)
Rank Player Matches
1 Martina Navratilova 74
2 Steffi Graf 66
3 Martina Navratilova 58
4 Margaret Court 57
5 Chris Evert 55
6 Martina Navratilova 54
7 Steffi Graf 46
8 Steffi Graf 45
9 Steffi Graf 44
10 Martina Navratilova 41
Most consecutive singles titles
1. 13 - Martina Navratilova (1984)
2. 12 - Margaret Court (1972-1973)
3. 11 - Steffi Graf (1989-1990)
4. 10 - Chris Evert (1974)
5. 9 - Martina Navratilova (1986)
5. 9 - Margaret Court (1970)
7. 8 - Steffi Graf (1988 )
7. 8 - Martina Navratilova (1983)
Best annual singles winning percentage
1 Martina Navratilova 98.9
2 Steffi Graf 97.7
3 Martina Navratilova 97.5
4 Steffi Graf 97.4
5 Martina Navratilova 96.8
6 Martina Navratilova 96.7
7 Steffi Graf 96
8 Margaret Court 95.3
9 Chris Evert 94.9
10 Margaret Court 94.8
Most consecutive years winning at least one singles title
1. 21 - Martina Navratilova (1974-1994)
2. 18 - Chris Evert (1971-1988 )
3. 14 - Steffi Graf (1986-1999)
4. 11 - Evonne Goolagong Cawley (1970-1980)
4. 11 - Virginia Wade (1968-1978 )
6. 9 - Sandra Cecchini (1984-1992)
6. 9 - Margaret Court (1968-1976)
6. 9 - Lindsay Davenport (1993-2001)
6. 9 - Conchita Martinez (1988-1996)
6. 9 - Arantxa Sanchez Vicario (1988-1996)
Most singles titles won in a year
1. 21 - Margaret Court (1970)
2. 18 - Margaret Court (1969, 1973)
3. 17 - Billie Jean King (1971)
4. 16 - Chris Evert (1974, 1975)
4. 16 - Martina Navratilova (1983)
6. 15 - Evonne Goolagong Cawley (1970)
6. 15 - Martina Navratilova (1982)
8. 14 - Margaret Court (1968 )
8. 14 - Steffi Graf (1989)
8. 14 - Martina Navratilova (1986)
11. 13 - Martina Navratilova (1984)
12. 12 - Chris Evert (1973, 1976)
12. 12 - Evonne Goolagong Cawley (1971)
12. 12 - Martina Navratilova (1985)
15. 11 - Tracy Austin (1980)
15. 11 - Chris Evert (1977)
15. 11 - Steffi Graf (1987, 1988 )
15. 11 - Martina Navratilova (1978, 1979)