Head to head
0
Hard
1
1
Clay
1
1
Carpet
2
Sergio Casal's wins on the left · Boris Becker's on the right · bar lengths share one scale
Momentum
Running lead across all meetings, oldest to newest (walkovers excluded).
All meetings (6)
| 1987 | Milan | Carpet | R16 | Boris Becker | 6-2 6-4 |
| 1987 | Davis Cup WG R1: ESP vs FRG | Clay | RR | Sergio Casal | 6-2 0-6 6-2 6-3 |
| 1986 | Paris | Carpet | F | Boris Becker | 6-4 6-3 7-6 |
| 1986 | US Open | Hard | R32 | Boris Becker | 7-5 6-4 6-2 |
| 1985 | Davis Cup WG R1: FRG vs ESP | Carpet | RR | Sergio Casal | 6-4 1-6 7-5 |
| 1984 | Hamburg | Clay | R64 | Boris Becker | 6-3 6-7 6-1 |
Methodology
Head-to-head totals and surface splits exclude walkovers (no match was played), which follows ATP convention — walkover meetings still appear in the match list. The momentum chart plots the running lead across all counted meetings, oldest to newest.