23‑Nov‑1981 | Manila | Clay | F | 82 | | (3)Krishnan d. (Q)Ivan Dupasquier [SUI] | 6-4 6-4 | | | | | | | | | |
23‑Nov‑1981 | Manila | Clay | SF | 82 | | (3)Krishnan d. Drew Gitlin [USA] | 6-2 6-3 | | | | | | | | | |
23‑Nov‑1981 | Manila | Clay | QF | 82 | | (3)Krishnan d. Charlie Fancutt [AUS] | 5-7 7-6 6-1 | | | | | | | | | |
23‑Nov‑1981 | Manila | Clay | R16 | 82 | | (3)Krishnan d. Chris Mayotte [USA] | 2-6 6-4 6-3 | | | | | | | | | |
23‑Nov‑1981 | Manila | Clay | R32 | 82 | | (3)Krishnan d. Anand Amritraj [IND] | 5-7 7-5 6-3 | | | | | | | | | |
16‑Nov‑1981 | Bangkok | Carpet | SF | 83 | | Mats Wilander [SWE] d. Krishnan | 6-1 6-4 | | | | | | | | | |
16‑Nov‑1981 | Bangkok | Carpet | QF | 83 | 46 | Krishnan d. (6)Van Winitsky [USA] | UNK | | | | | | | | | |
16‑Nov‑1981 | Bangkok | Carpet | R16 | 83 | 29 | Krishnan d. (2)Mark Edmondson [AUS] | 6-7 7-6 6-2 | | | | | | | | | |
16‑Nov‑1981 | Bangkok | Carpet | R32 | 83 | | Krishnan d. (Q)Hans Hansson [AUS] | 6-3 7-6 | | | | | | | | | |
9‑Nov‑1981 | Taipei | Carpet | R32 | 68 | 51 | (8)Tim Gullikson [USA] d. Krishnan | 7-6 3-6 6-3 | | | | | | | | | |
2‑Nov‑1981 | Hong Kong | Hard | R32 | 68 | 93 | Brad Drewett [AUS] d. Krishnan | 6-2 4-6 6-3 | | | | | | | | | |
26‑Oct‑1981 | Tokyo Indoor | Carpet | R32 | 59 | 2 | (2)Bjorn Borg [SWE] d. Krishnan | 6-3 4-6 6-2 | | | | | | | | | |
19‑Oct‑1981 | Tokyo Outdoor | Clay | R64 | 59 | | Jun Kuki [JPN] d. (9)Krishnan | 6-2 7-6 | | | | | | | | | |
1‑Sep‑1981 | US Open | Hard | QF | | 1 | (1)John Mcenroe [USA] d. Krishnan | 6-7 7-6 6-4 6-2 | | | | | | | | | |
1‑Sep‑1981 | US Open | Hard | R16 | | 7 | Krishnan d. (7)Gene Mayer [USA] | 4-6 1-6 7-6 7-5? | | | | | | | | | |
1‑Sep‑1981 | US Open | Hard | R32 | | | Krishnan d. Marty Davis [USA] | 6-2 7-5 6-7 6-4 | | | | | | | | | |
1‑Sep‑1981 | US Open | Hard | R64 | | 27 | Krishnan d. Stan Smith [USA] | 6-4 6-3 6-3 | | | | | | | | | |
1‑Sep‑1981 | US Open | Hard | R128 | | 91 | Krishnan d. Per Hjertquist [SWE] | 6-1 6-1 6-3 | | | | | | | | | |
17‑Aug‑1981 | Cincinnati | Hard | R32 | | 35 | (WC)Bill Scanlon [USA] d. Krishnan | 6-3 6-3 | | | | | | | | | |
17‑Aug‑1981 | Cincinnati | Hard | R64 | | 88 | Krishnan d. Per Hjertquist [SWE] | 6-3 6-3 | | | | | | | | | |
10‑Aug‑1981 | Montreal / Toronto | Hard | QF | | 42 | (15)Shlomo Glickstein [ISR] d. Krishnan | 3-6 6-3 6-4 | | | | | | | | | |
10‑Aug‑1981 | Montreal / Toronto | Hard | R16 | | 39 | Krishnan d. (13)Tom Gullikson [USA] | 6-1 6-3 | | | | | | | | | |
10‑Aug‑1981 | Montreal / Toronto | Hard | R32 | | | Krishnan d. Sherwood Stewart [USA] | 7-5 6-1 | | | | | | | | | |
10‑Aug‑1981 | Montreal / Toronto | Hard | R64 | | 75 | Krishnan d. Nick Saviano [USA] | 2-6 6-3 6-2 | | | | | | | | | |
3‑Aug‑1981 | Indianapolis | Clay | R64 | | 79 | Per Hjertquist [SWE] d. Krishnan | 7-6 6-2 | | | | | | | | | |
28‑Jul‑1981 | South Orange | Clay | R32 | | 100 | (8)Manuel Orantes [ESP] d. Krishnan | 6-3 6-3 | | | | | | | | | |
20‑Jul‑1981 | Hilversum | Clay | R32 | 100 | | Erick Iskersky [USA] d. (8)Krishnan | 6-0 6-2 | | | | | | | | | |
13‑Jul‑1981 | Stuttgart Outdoor | Clay | R32 | 93 | 2 | (1)Bjorn Borg [SWE] d. Krishnan | 3-6 6-1 6-1 | | | | | | | | | |
8‑Jun‑1981 | Queen's Club | Grass | R64 | 74 | | Greg Whitecross [AUS] d. Krishnan | 6-2 6-1 | | | | | | | | | |
25‑May‑1981 | Roland Garros | Clay | R128 | 70 | 16 | (11)Yannick Noah [FRA] d. Krishnan | 6-1 6-1 6-4 | | | | | | | | | |
18‑May‑1981 | Rome | Clay | R64 | 65 | 89 | Jose Lopez Maeso [ESP] d. Krishnan | 6-3 6-4 | | | | | | | | | |
11‑May‑1981 | Hamburg | Clay | R64 | 57 | 17 | (5)Balazs Taroczy [HUN] d. Krishnan | 5-7 6-4 7-6 | | | | | | | | | |
13‑Apr‑1981 | Los Angeles | Hard | R32 | 58 | 41 | (8)Stan Smith [USA] d. Krishnan | 7-5 7-5 | | | | | | | | | |
6‑Apr‑1981 | Houston | Clay | R16 | 61 | 26 | Victor Pecci [PAR] d. Krishnan | 4-6 7-6 6-3 | | | | | | | | | |
6‑Apr‑1981 | Houston | Clay | R32 | 61 | 25 | Krishnan d. (6)Vijay Amritraj [IND] | 3-6 6-2 6-2 | | | | | | | | | |
23‑Mar‑1981 | Napa | Hard | R16 | 52 | | John Hayes [USA] d. (3)Krishnan | 4-6 7-6 6-3 | | | | | | | | | |
23‑Mar‑1981 | Napa | Hard | R32 | 52 | | (3)Krishnan d. Billy Martin [USA] | 6-2 6-1 | | | | | | | | | |
13‑Feb‑1981 | Davis Cup AOC SF: THA vs IND | Hard | RR | 50 | | Krishnan d. Sombat Uamongkol [THA] | 6-3 6-2 6-2 | | | | | | | | | |
13‑Feb‑1981 | Davis Cup AOC SF: THA vs IND | Hard | RR | 50 | | Krishnan d. Pichet Boratisa [THA] | 6-3 6-2 6-1 | | | | | | | | | |