23‑Jan‑1978 | Philadelphia WCT | Carpet | SF | 6 | 25 | (10)Roscoe Tanner [USA] d. (6)Dibbs | 7-6 5-7 6-4 6-1 | | | | | | | | | |
23‑Jan‑1978 | Philadelphia WCT | Carpet | QF | 6 | 14 | (6)Dibbs d. (15)Sandy Mayer [USA] | 7-6 3-6 6-4 | | | | | | | | | |
23‑Jan‑1978 | Philadelphia WCT | Carpet | R16 | 6 | 13 | (6)Dibbs d. (14)Harold Solomon [USA] | 6-3 6-2 | | | | | | | | | |
23‑Jan‑1978 | Philadelphia WCT | Carpet | R32 | 6 | 49 | (6)Dibbs d. Terry Moor [USA] | 7-6 6-3 | | | | | | | | | |
23‑Jan‑1978 | Philadelphia WCT | Carpet | R64 | 6 | 51 | (6)Dibbs d. Bob Hewitt [RSA] | 6-2 6-1 | | | | | | | | | |
24‑Jan‑1977 | Philadelphia WCT | Carpet | R16 | 8 | 70 | Bernie Mitton [RSA] d. (7)Dibbs | 6-4 4-6 6-3 | | | | | | | | | |
24‑Jan‑1977 | Philadelphia WCT | Carpet | R32 | 8 | 77 | (7)Dibbs d. Sherwood Stewart [USA] | 6-0 6-3 | | | | | | | | | |
24‑Jan‑1977 | Philadelphia WCT | Carpet | R64 | 8 | 78 | (7)Dibbs d. Rod Laver [AUS] | 4-6 6-0 6-1 | | | | | | | | | |
26‑Jan‑1976 | Philadelphia WCT | Carpet | QF | 18 | 11 | (8)Tom Okker [NED] d. (14)Dibbs | 6-2 2-6 6-2 | | | | | | | | | |
26‑Jan‑1976 | Philadelphia WCT | Carpet | R16 | 18 | 7 | (14)Dibbs d. (4)Ilie Nastase [ROU] | DEF | | | | | | | | | |
26‑Jan‑1976 | Philadelphia WCT | Carpet | R32 | 18 | 56 | (14)Dibbs d. Dick Crealy [AUS] | 2-6 7-6(2) 6-3 | | | | | | | | | |
26‑Jan‑1976 | Philadelphia WCT | Carpet | R64 | 18 | 28 | (14)Dibbs d. Sandy Mayer [USA] | 3-6 6-2 6-2 | | | | | | | | | |
20‑Jan‑1975 | Philadelphia WCT | Carpet | R32 | 20 | 28 | John Alexander [AUS] d. (15)Dibbs | 6-4 6-0 | | | | | | | | | |
20‑Jan‑1975 | Philadelphia WCT | Carpet | R64 | 20 | 34 | (15)Dibbs d. Adriano Panatta [ITA] | 7-5 6-3 | | | | | | | | | |
21‑Jan‑1974 | Philadelphia WCT | Carpet | QF | 28 | 9 | (7)Jan Kodes [CZE] d. Dibbs | 6-4 6-4 | | | | | | | | | |
21‑Jan‑1974 | Philadelphia WCT | Carpet | R16 | 28 | 73 | Dibbs d. Robert Maud [RSA] | 6-2 6-4 | | | | | | | | | |
21‑Jan‑1974 | Philadelphia WCT | Carpet | R32 | 28 | 16 | Dibbs d. (13)Roger Taylor [GBR] | 6-3 1-6 7-5 | | | | | | | | | |
21‑Jan‑1974 | Philadelphia WCT | Carpet | R64 | 28 | 55 | Dibbs d. Patrice Dominguez [FRA] | 6-1 7-6(4) | | | | | | | | | |