13‑May‑1974 | Las Vegas | Hard | SF | 3 | 6 | (4)Rod Laver [AUS] d. (2)Okker | 6-7 6-3 6-2 | | | | | | | | | |
21‑Jan‑1974 | Philadelphia WCT | Carpet | QF | 4 | 8 | (6)Rod Laver [AUS] d. (3)Okker | 6-4 6-2 | | | | | | | | | |
30‑Apr‑1972 | Denver WCT | Carpet | SF | | | (1)Rod Laver [AUS] d. (3)Okker | 6-3 7-6 | | | | | | | | | |
9‑Apr‑1972 | Houston WCT | Clay | SF | | | Rod Laver [AUS] d. Okker | 6-2 6-1 | | | | | | | | | |
20‑Feb‑1972 | Toronto WCT | Carpet | SF | | | Rod Laver [AUS] d. Okker | 2-6 6-2 7-6 | | | | | | | | | |
8‑Feb‑1972 | Philadelphia WCT | Carpet | SF | | | (1)Rod Laver [AUS] d. (4)Okker | 6-3 6-3 6-3 | | | | | | | | | |
10‑Oct‑1971 | Vancouver WCT | | SF | | | Okker d. Rod Laver [AUS] | 5-7 6-4 6-3 | | | | | | | | | |
27‑Sep‑1971 | Berkeley | Hard | SF | | | (1)Rod Laver [AUS] d. (3)Okker | 4-6 7-5 6-4 | | | | | | | | | |
27‑Aug‑1971 | Hilton Head | Clay | SF | | | Rod Laver [AUS] d. Okker | 6-1 6-1 | | | | | | | | | |
1‑Aug‑1971 | Quebec WCT | | F | | | Okker d. Rod Laver [AUS] | 6-3 7-6 6-7 6-4 | | | | | | | | | |
21‑Jun‑1971 | Wimbledon | Grass | R16 | | | (1)Rod Laver [AUS] d. Okker | 7-5 6-1 2-6 7-5 | | | | | | | | | |
4‑Apr‑1971 | Miami WCT | Hard | QF | | | (4)Rod Laver [AUS] d. (5)Okker | 6-3 6-0 | | | | | | | | | |
19‑Mar‑1971 | Champions Classic | Carpet | F | | | Rod Laver [AUS] d. Okker | 6-5 6-2 6-1 | | | | | | | | | |
19‑Mar‑1971 | Champions Classic | Carpet | RR | | | Rod Laver [AUS] d. Okker | 6-1 6-4 6-3 | | | | | | | | | |
19‑Mar‑1971 | Champions Classic | Carpet | RR | | | Rod Laver [AUS] d. Okker | 5-6 5-6 6-2 6-2 6-2 | | | | | | | | | |
15‑Oct‑1970 | Bonn | | F | | | Rod Laver [AUS] d. Okker | 6-2 6-7 6-2 | | | | | | | | | |
29‑Sep‑1970 | Vancouver | Carpet | SF | | | Rod Laver [AUS] d. Okker | 6-4 6-0 | | | | | | | | | |
6‑Jul‑1970 | Dublin | Grass | SF | | | Rod Laver [AUS] d. Okker | 3-6 6-3 6-2 | | | | | | | | | |
17‑Nov‑1969 | Wembley | Carpet | SF | | | Rod Laver [AUS] d. Okker | 8-6 6-2 | | | | | | | | | |
13‑Aug‑1969 | Fort Worth | Hard | SF | | | Rod Laver [AUS] d. Okker | 2-6 6-3 6-2 | | | | | | | | | |
9‑Jul‑1969 | Boston | Carpet | QF | | | Rod Laver [AUS] d. Okker | 6-3 10-8 | | | | | | | | | |
28‑May‑1969 | Roland Garros | Clay | SF | | | (1)Rod Laver [AUS] d. (5)Okker | 4-6 6-0 6-0 6-4 | | | | | | | | | |
21‑May‑1969 | London 2 | Hard | SF | | | Rod Laver [AUS] d. Okker | 10-5 | | | | | | | | | |
4‑Apr‑1969 | Johannesburg | Hard | F | | | Rod Laver [AUS] d. Okker | 6-3 10-8 6-3 | | | | | | | | | |
13‑Feb‑1969 | Hollywood | Clay | SF | | | Rod Laver [AUS] d. Okker | W/O | | | | | | | | | |
17‑Jun‑1968 | London | Grass | SF | | | Okker d. Rod Laver [AUS] | 6-4 6-4 | | | | | | | | | |