H2H data updated: 2026-07-20 14:15 UTC
Clark Graebner vs Francisco Castillo H2H: 1-0
Clark Graebner holds a 1–0 lead over Francisco Castillo in their ATP head-to-head. Across 1 main-draw meeting, Clark Graebner leads 1–0 on clay. Most recently, Clark Graebner won the 1968 Milwaukee second round 6-0 6-0.
Want to explore more matchups? Advanced rivalry search lets you browse current and historical rivalries, unbeaten records, or every matchup for a player.
USA
Age 82
Right-Handed
188 cm / 6'2"
H2H
1
–
0
1 main draw meetings
H2H Match Log
| Date | Tournament | Category | Round | Surface | Winner | Score | Loser | Match |
|---|---|---|---|---|---|---|---|---|
| Jul 17, 1968* | Milwaukee | ATP 250 | R64 | Clay | Clark Graebner | 6-0 6-0 | Francisco Castillo | Match data |
* Estimated match date where the exact historical date is unavailable.
Career Comparison
| Player | Current | Peak | Pts | Elo | W | L | Win % | GS | 1000 | Finals | 500 | 250 | Titles |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clark Graebner | #199 | #45 | 0 | 2,015 | 342 | 162 | 67.9% | 0 | 0 | 0 | 0 | 12 | 12 |
| Francisco Castillo | — | — | — | 1,500 | — | — | — | 0 | 0 | 0 | 0 | 0 | 0 |
Career Progression by Age
Seasons are aligned by the age each player spent most of that calendar year. GS and Titles are cumulative career totals through that season.
| Clark Graebner | Francisco Castillo | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | W-L | Win % | Rank | Elo | GS | Titles | Yr | W-L | Win % | Rank | Elo | GS | Titles |
| 1968 | 74–22 | 77.1% | — | 1,820 | 0 | 2 | — | — | — | — | — | — | — |
| 1969 | 49–14 | 77.8% | — | 1,842 | 0 | 6 | — | — | — | — | — | — | — |
| 1970 | 58–28 | 67.4% | — | 1,839 | 0 | 8 | — | — | — | — | — | — | — |
| 1971 | 75–29 | 72.1% | — | 1,878 | 0 | 11 | — | — | — | — | — | — | — |
| 1972 | 33–22 | 60.0% | — | 1,812 | 0 | 11 | — | — | — | — | — | — | — |
| 1973 | 34–19 | 64.2% | #48 | 1,768 | 0 | 12 | — | — | — | — | — | — | — |
| 1974 | 11–14 | 44.0% | #99 | 1,685 | 0 | 12 | — | — | — | — | — | — | — |
| 1975 | 8–11 | 42.1% | #120 | 1,580 | 0 | 12 | — | — | — | — | — | — | — |
| 1976 | 0–3 | 0.0% | #199 | 1,537 | 0 | 12 | — | — | — | — | — | — | — |