14‑Dec‑1981 | Sofia | Carpet | R32 | | | Paul Torre [FRA] d. Sanders | 3-6 6-2 7-5 | | | | | | | | | |
23‑Nov‑1981 | Manila | Clay | R16 | | | Brad Gilbert [USA] d. Sanders | 6-4 4-6 6-1 | | | | | | | | | |
23‑Nov‑1981 | Manila | Clay | R32 | | | Sanders d. (5)Marty Davis [USA] | 6-0 6-2 | | | | | | | | | |
16‑Nov‑1981 | Bangkok | Carpet | R32 | | 64 | (7)John Austin [USA] d. Sanders | 6-2 4-6 6-4 | | | | | | | | | |
9‑Nov‑1981 | Taipei | Carpet | R32 | | | Mike Estep [USA] d. Sanders | 6-7 6-3 7-5 | | | | | | | | | |
2‑Nov‑1981 | Hong Kong | Hard | R32 | | 34 | (5)Mark Edmondson [AUS] d. Sanders | 1-6 7-6 6-4 | | | | | | | | | |
19‑Oct‑1981 | Vienna | Hard | R32 | | 39 | (7)Carlos Kirmayr [BRA] d. Sanders | 7-6 7-6 | | | | | | | | | |
5‑Oct‑1981 | Tel Aviv | Hard | R16 | | 38 | (2)Shlomo Glickstein [ISR] d. Sanders | 6-4 5-7 7-6 | | | | | | | | | |
5‑Oct‑1981 | Tel Aviv | Hard | R32 | | | Sanders d. Shahar Perkiss [ISR] | 7-6 2-6 6-4 | | | | | | | | | |
29‑Sep‑1981 | Athens CH | Clay | R16 | | | Leo Palin [FIN] d. Sanders | 6-3 7-5 | | | | | | | | | |
29‑Sep‑1981 | Athens CH | Clay | R32 | | | Sanders d. (4)Ismail El Shafei [EGY] | 6-2 6-2 | | | | | | | | | |
25‑Sep‑1981 | Davis Cup EUR F: URS vs NED | Clay | RR | | | Alexander Zverev Sr [RUS] d. Sanders | 6-4 7-9 1-6 9-7 6-3 | | | | | | | | | |
23‑Aug‑1981 | Brussels CH | Clay | R32 | | | Thierry Stevaux [BEL] d. (2)Sanders | 7-5 6-4 | | | | | | | | | |
27‑Jul‑1981 | Zell Am See CH | Clay | R32 | | 73 | Anders Jarryd [SWE] d. (3)Sanders | 7-5 7-5 | | | | | | | | | |
20‑Jul‑1981 | Hilversum | Clay | R32 | | | Eric Deblicker [FRA] d. Sanders | 6-2 6-4 | | | | | | | | | |
13‑Jul‑1981 | Kitzbuhel | Clay | R64 | 95 | | Jiri Granat [CZE] d. (11)Sanders | 6-1 6-4 | | | | | | | | | |
9‑Jul‑1981 | Davis Cup EUR SF: FIN vs NED | Clay | RR | 96 | | Sanders d. Kimmo Alkio [FIN] | 6-3 6-1 6-1 | | | | | | | | | |
9‑Jul‑1981 | Davis Cup EUR SF: FIN vs NED | Clay | RR | 96 | | Sanders d. Matti Timonen [FIN] | 4-6 6-3 7-5 6-4 | | | | | | | | | |
12‑Jun‑1981 | Davis Cup EUR QF: NED vs IRL | Clay | RR | 93 | | Sanders d. Matt Doyle [USA] | 8-6 2-6 2-6 6-2 6-2 | | | | | | | | | |
12‑Jun‑1981 | Davis Cup EUR QF: NED vs IRL | Clay | RR | 93 | | Sanders d. Sean Sorensen [IRL] | 6-3 6-2 | | | | | | | | | |
25‑May‑1981 | Roland Garros | Clay | R128 | 89 | 92 | Fernando Luna [ESP] d. Sanders | 6-2 4-6 6-2 6-4 | | | | | | | | | |
30‑Mar‑1981 | Linz | Hard | QF | | 83 | (6)Nick Saviano [USA] d. Sanders | 6-4 6-3 | | | | | | | | | |
30‑Mar‑1981 | Linz | Hard | R16 | | 40 | Sanders d. (1)Carlos Kirmayr [BRA] | 6-4 2-6 6-4 | | | | | | | | | |
30‑Mar‑1981 | Linz | Hard | R32 | | | Sanders d. Brad Drewett [AUS] | 7-6 6-7 6-1 | | | | | | | | | |
23‑Mar‑1981 | Stuttgart Indoor | Hard | R32 | | 96 | Klaus Eberhard [GER] d. Sanders | 7-5 6-4 | | | | | | | | | |
16‑Mar‑1981 | Rotterdam | Hard | R32 | 94 | 38 | Fritz Buehning [USA] d. Sanders | 7-6 4-6 6-3 | | | | | | | | | |