Most wins in same season on Clay in Semifinals at Best of 1
Most wins in same season on Clay in Semifinals at Best of 1
| Rank | Player | Wins | Year |
|---|---|---|---|
| 1 |  Guillermo Vilas | 16 | 1977 |
| 2 |  Manuel Orantes | 12 | 1975 |
| 3 |  Thomas Muster | 12 | 1995 |
| 4 | Guillermo Vilas | 11 | 1981 |
| 5 | Manuel Orantes | 10 | 1976 |
| 6 | Manuel Orantes | 10 | 1973 |
| 7 |  Ilie Nastase | 10 | 1973 |
| 8 | Alberto Berasategui | 9 | 1994 |
| 9 | Guillermo Vilas | 9 | 1982 |
| 10 | Rafael Nadal | 8 | 2013 |