12‑Dec‑1983 | Sydney Outdoor | Grass | R64 | | 55 | (13)Chip Hooper [USA] d. Stefanki | 6-4 6-2 | | | | | | | | | |
29‑Nov‑1983 | Australian Open | Grass | R128 | | | Mike Leach [USA] d. Stefanki | 6-4 7-6 6-7 6-7 6-3 | | | | | | | | | |
7‑Nov‑1983 | Taipei | Carpet | R32 | | | Jim Gurfein [USA] d. (Q)Stefanki | 7-6 6-1 | | | | | | | | | |
31‑Oct‑1983 | Hong Kong | Hard | R16 | | | Rod Frawley [AUS] d. (Q)Stefanki | 1-6 6-1 6-4 | | | | | | | | | |
31‑Oct‑1983 | Hong Kong | Hard | R32 | | 30 | (Q)Stefanki d. (2)Robert Vant Hof [USA] | 6-2 7-6 | | | | | | | | | |
17‑Oct‑1983 | Tokyo Outdoor | Hard | QF | | 17 | (2)Eliot Teltscher [USA] d. Stefanki | 6-2 6-3 | | | | | | | | | |
17‑Oct‑1983 | Tokyo Outdoor | Hard | R16 | | | Stefanki d. (Q)Robert Seguso [USA] | 6-3 6-7 7-6 | | | | | | | | | |
17‑Oct‑1983 | Tokyo Outdoor | Hard | R32 | | 39 | Stefanki d. (7)Scott Davis [USA] | 7-6 6-4 | | | | | | | | | |
17‑Oct‑1983 | Tokyo Outdoor | Hard | R64 | | 100 | Stefanki d. Glenn Michibata [CAN] | 3-6 6-3 6-4 | | | | | | | | | |
15‑Aug‑1983 | Cincinnati | Hard | R32 | | 21 | (14)Sandy Mayer [USA] d. (Q)Stefanki | 6-3 6-1 | | | | | | | | | |
15‑Aug‑1983 | Cincinnati | Hard | R64 | | 33 | (Q)Stefanki d. Heinz Gunthardt [SUI] | 4-6 7-5 7-6 | | | | | | | | | |
8‑Aug‑1983 | Montreal / Toronto | Hard | R64 | | 16 | (9)Eliot Teltscher [USA] d. (Q)Stefanki | 7-5 6-2 | | | | | | | | | |
1‑May‑1983 | Forest Hills WCT | Clay | R32 | | 37 | (8)Paul Mcnamee [AUS] d. Stefanki | 6-2 4-6 6-4 | | | | | | | | | |
1‑May‑1983 | Forest Hills WCT | Clay | R64 | | 76 | Stefanki d. Ramesh Krishnan [IND] | 6-7 6-0 6-4 | | | | | | | | | |
7‑Mar‑1983 | Brussels | Carpet | R16 | | 9 | (4)Mats Wilander [SWE] d. (Q)Stefanki | 6-1 6-1 | | | | | | | | | |
7‑Mar‑1983 | Brussels | Carpet | R32 | | | (Q)Stefanki d. (Q)Colin Dowdeswell [GBR] | 6-7 6-4 6-4 | | | | | | | | | |
21‑Feb‑1983 | Lagos CH | Hard | R16 | | | Leif Shiras [USA] d. Stefanki | 4-6 6-3 6-2 | | | | | | | | | |
21‑Feb‑1983 | Lagos CH | Hard | R32 | | | Stefanki d. Mike Barr [USA] | 6-1 6-2 | | | | | | | | | |
14‑Feb‑1983 | Ogun CH | Hard | F | | | Stefanki d. Mike Barr [USA] | 5-7 6-3 8-6 | | | | | | | | | |
14‑Feb‑1983 | Ogun CH | Hard | SF | | | Stefanki d. Leo Palin [FIN] | 6-3 6-0 | | | | | | | | | |
14‑Feb‑1983 | Ogun CH | Hard | QF | | | Stefanki d. Leif Shiras [USA] | 6-1 6-2 | | | | | | | | | |
14‑Feb‑1983 | Ogun CH | Hard | R16 | | | Stefanki d. Patrice Kuchna [FRA] | 6-1 6-2 | | | | | | | | | |
14‑Feb‑1983 | Ogun CH | Hard | R32 | | | Stefanki d. Junie Chatman [USA] | 1-6 6-3 6-4 | | | | | | | | | |
7‑Feb‑1983 | Nairobi CH | Clay | R16 | | | John Austin [USA] d. Stefanki | 7-6 4-6 6-4 | | | | | | | | | |
7‑Feb‑1983 | Nairobi CH | Clay | R32 | | | Stefanki d. Phillip Ilako [KEN] | 6-2 6-1 | | | | | | | | | |