23‑Jan‑1978 | Philadelphia WCT | Carpet | R32 | 23 | 4 | (4)Vitas Gerulaitis [USA] d. Borowiak | 6-1 6-1 | | | | | | | | | |
24‑Jan‑1977 | Philadelphia WCT | Carpet | SF | 63 | 15 | (12)Dick Stockton [USA] d. Borowiak | 6-3 6-4 7-6(3) | | | | | | | | | |
24‑Jan‑1977 | Philadelphia WCT | Carpet | QF | 63 | 30 | Borowiak d. Vijay Amritraj [IND] | 3-6 6-2 7-5 | | | | | | | | | |
24‑Jan‑1977 | Philadelphia WCT | Carpet | R16 | 63 | 10 | Borowiak d. (6)Harold Solomon [USA] | 6-0 6-4 | | | | | | | | | |
24‑Jan‑1977 | Philadelphia WCT | Carpet | R32 | 63 | 18 | Borowiak d. (15)Vitas Gerulaitis [USA] | 6-4 3-6 6-3 | | | | | | | | | |
24‑Jan‑1977 | Philadelphia WCT | Carpet | R64 | 63 | 25 | Borowiak d. Tom Okker [NED] | 6-3 3-6 6-3 | | | | | | | | | |
26‑Jan‑1976 | Philadelphia WCT | Carpet | R64 | 48 | 24 | Marty Riessen [USA] d. Borowiak | 7-5 7-5 | | | | | | | | | |
20‑Jan‑1975 | Philadelphia WCT | Carpet | R32 | 42 | 7 | (5)Arthur Ashe [USA] d. Borowiak | 6-3 5-7 6-4 | | | | | | | | | |
20‑Jan‑1975 | Philadelphia WCT | Carpet | R64 | 42 | 32 | Borowiak d. Mark Cox [GBR] | 7-5 4-6 6-3 | | | | | | | | | |
20‑Jan‑1975 | Philadelphia WCT | Carpet | R128 | 42 | 79 | Borowiak d. Pierre Barthes [FRA] | W/O | | | | | | | | | |
21‑Jan‑1974 | Philadelphia WCT | Carpet | R64 | 82 | 8 | (6)Rod Laver [AUS] d. Borowiak | 6-4 6-2 | | | | | | | | | |
21‑Jan‑1974 | Philadelphia WCT | Carpet | R128 | 82 | 141 | Borowiak d. Ray Ruffels [AUS] | 6-4 6-3 | | | | | | | | | |
8‑Feb‑1972 | Philadelphia WCT | Carpet | QF | | | (4)Tom Okker [NED] d. Borowiak | 7-5 6-3 | | | | | | | | | |
8‑Feb‑1972 | Philadelphia WCT | Carpet | R16 | | | Borowiak d. (5)John Newcombe [AUS] | 6-1 5-7 6-4 | | | | | | | | | |
8‑Feb‑1972 | Philadelphia WCT | Carpet | R32 | | | Borowiak d. Roy Barth [USA] | 6-2 6-2 | | | | | | | | | |
2‑Feb‑1970 | Philadelphia WCT | Carpet | R64 | | | Roger Taylor [GBR] d. (Q)Borowiak | 6-3 8-6 | | | | | | | | | |
8‑Feb‑1968 | Philadelphia WCT | Carpet | R16 | | | Torben Ulrich [DEN] d. Borowiak | 9-7 6-4 | | | | | | | | | |