| RR | W | Zeeshan Ali | 6-3 6-3 | H2H |
| RR | W | Srinivasan Vasudevan | 6-3 3-6 7-6(1) 6-4 | H2H |
🇰🇷 KOR · Right-handed · 185 cm · b. 1962-07-12
Jin-Sun Yoo
Active 1985–1989 · best rank seen: 288
10–9
0
0
0
0
75
Hard
5–5 (50.0%)
Clay
3–2 (60.0%)
Grass
2–0 (100.0%)
Carpet
0–2 (0.0%)
Season by season
Gold band: best three-year window (1987–1989).
Match results
| R16 | L | John Fitzgerald | 7-6 7-5 | H2H |
| R32 | W | Broderick Dyke | 2-6 6-1 7-6 | H2H |
Methodology
Titles include Slams, Masters, Tour Finals, 500s, 250s, legacy tour events and Olympic gold; Davis Cup is excluded, and walkovers are excluded from all win–loss records. GOAT points value every round reached, scaled per tier (Slam title 2000 anchor; ranking includes Slam champions only, but every player's points are shown here). Elo is a chess-style rating over the full match history (K = 250/(n+5)^0.4); the timeline shows pre-match ratings, sampled. The gold band on the season chart marks the best three-consecutive-year window.