30‑Nov‑1990 | Davis Cup WG F: USA vs AUS | Clay | RR | 4 | 32 | Agassi d. Richard Fromberg [AUS] | 4-6 6-2 4-6 6-2 6-4 | | | | | | | | | |
30‑Nov‑1990 | Davis Cup WG F: USA vs AUS | Clay | RR | 4 | 57 | Darren Cahill [AUS] d. Agassi | 6-4 4-6 RET | | | | | | | | | |
12‑Nov‑1990 | Tour Finals | Carpet | F | 4 | 1 | Agassi d. Stefan Edberg [SWE] | 5-7 7-6 7-5 6-2 | (ch) | | | | | | | | |
12‑Nov‑1990 | Tour Finals | Carpet | SF | 4 | 2 | Agassi d. Boris Becker [GER] | 6-2 6-4 | (ch) | | | | | | | | |
12‑Nov‑1990 | Tour Finals | Carpet | RR | 4 | 1 | Stefan Edberg [SWE] d. Agassi | 7-6 4-6 7-6 | (ch) | | | | | | | | |
12‑Nov‑1990 | Tour Finals | Carpet | RR | 4 | 8 | Agassi d. Emilio Sanchez [ESP] | 6-0 6-3 | | | | | | | | | |
12‑Nov‑1990 | Tour Finals | Carpet | RR | 4 | 5 | Agassi d. Pete Sampras [USA] | 6-4 6-2 | (ch) | | | | | | | | |
22‑Oct‑1990 | Stockholm Masters | Carpet | R32 | 4 | 76 | (WC)Nicklas Kulti [SWE] d. (3)Agassi | 6-3 7-5 | | | | | | | | | |
21‑Sep‑1990 | Davis Cup WG SF: AUT vs USA | Clay | RR | 4 | 21 | Agassi d. Horst Skoff [AUT] | 7-6(3) 6-0 6-1 | | | | | | | | | |
21‑Sep‑1990 | Davis Cup WG SF: AUT vs USA | Clay | RR | 4 | 7 | Thomas Muster [AUT] d. Agassi | 6-2 6-2 7-6(2) | | | | | | | | | |
27‑Aug‑1990 | US Open | Hard | F | 4 | 12 | (12)Pete Sampras [USA] d. (4)Agassi | 6-4 6-3 6-2 | (ch) | | | | | | | | |
27‑Aug‑1990 | US Open | Hard | SF | 4 | 2 | (4)Agassi d. (2)Boris Becker [GER] | 6-7 6-3 6-2 6-3 | (ch) | | | | | | | | |
27‑Aug‑1990 | US Open | Hard | QF | 4 | 50 | (4)Agassi d. Andrei Cherkasov [RUS] | 6-2 6-2 6-3 | | | | | | | | | |
27‑Aug‑1990 | US Open | Hard | R16 | 4 | 14 | (4)Agassi d. (13)Jay Berger [USA] | 7-5 6-0 6-2 | | | | | | | | | |
27‑Aug‑1990 | US Open | Hard | R32 | 4 | 51 | (4)Agassi d. Franco Davin [ARG] | 7-5 6-4 6-0 | | | | | | | | | |
27‑Aug‑1990 | US Open | Hard | R64 | 4 | 33 | (4)Agassi d. Petr Korda [CZE] | 7-5 5-7 6-0 6-4 | | | | | | | | | |
27‑Aug‑1990 | US Open | Hard | R128 | 4 | 90 | (4)Agassi d. Grant Connell [CAN] | 6-4 6-2 6-2 | | | | | | | | | |
13‑Aug‑1990 | Indianapolis | Hard | QF | 4 | 153 | Peter Lundgren [SWE] d. (2)Agassi | 6-4 6-0 | | | | | | | | | |
13‑Aug‑1990 | Indianapolis | Hard | R16 | 4 | 314 | (2)Agassi d. (WC)Todd Martin [USA] | 7-6 6-4 | | | | | | | | | |
13‑Aug‑1990 | Indianapolis | Hard | R32 | 4 | 286 | (2)Agassi d. (WC)Robert Seguso [USA] | 6-2 6-3 | | | | | | | | | |
6‑Aug‑1990 | Cincinnati Masters | Hard | R16 | 4 | 27 | (15)Richard Fromberg [AUS] d. (2)Agassi | 6-4 3-6 6-3 | | | | | | | | | |
6‑Aug‑1990 | Cincinnati Masters | Hard | R32 | 4 | 41 | (2)Agassi d. Richey Reneberg [USA] | 6-4 6-3 | | | | | | | | | |
23‑Jul‑1990 | Canada Masters | Hard | QF | 4 | 24 | (7)Michael Chang [USA] d. (1)Agassi | 4-6 7-5 7-5 | | | | | | | | | |
23‑Jul‑1990 | Canada Masters | Hard | R16 | 4 | 66 | (1)Agassi d. Darren Cahill [AUS] | 6-2 6-4 | | | | | | | | | |
23‑Jul‑1990 | Canada Masters | Hard | R32 | 4 | 67 | (1)Agassi d. Michael Stich [GER] | 6-3 6-7 6-3 | | | | | | | | | |
16‑Jul‑1990 | Washington | Hard | F | 4 | 38 | (1)Agassi d. (6)Jim Grabb [USA] | 6-1 6-4 | | | | | | | | | |
16‑Jul‑1990 | Washington | Hard | SF | 4 | 23 | (1)Agassi d. (5)Michael Chang [USA] | 6-3 6-1 | | | | | | | | | |
16‑Jul‑1990 | Washington | Hard | QF | 4 | 39 | (1)Agassi d. (7)Richey Reneberg [USA] | 7-6 6-0 | | | | | | | | | |
16‑Jul‑1990 | Washington | Hard | R16 | 4 | 71 | (1)Agassi d. (15)Gilad Bloom [ISR] | 6-1 7-5 | | | | | | | | | |
16‑Jul‑1990 | Washington | Hard | R32 | 4 | 85 | (1)Agassi d. Brad Pearce [USA] | 7-6 6-3 | | | | | | | | | |
28‑May‑1990 | Roland Garros | Clay | F | 5 | 7 | (4)Andres Gomez [ECU] d. (3)Agassi | 6-3 2-6 6-4 6-4 | (ch) | | | | | | | | |
28‑May‑1990 | Roland Garros | Clay | SF | 5 | 24 | (3)Agassi d. Jonas Svensson [SWE] | 6-1 6-4 3-6 6-3 | (ch) | | | | | | | | |
28‑May‑1990 | Roland Garros | Clay | QF | 5 | 14 | (3)Agassi d. (11)Michael Chang [USA] | 6-2 6-1 4-6 6-2 | | | | | | | | | |
28‑May‑1990 | Roland Garros | Clay | R16 | 5 | 17 | (3)Agassi d. (13)Jim Courier [USA] | 6-7 6-1 6-4 6-0 | | | | | | | | | |
28‑May‑1990 | Roland Garros | Clay | R32 | 5 | 263 | (3)Agassi d. (Q)Arnaud Boetsch [FRA] | 6-3 6-2 6-0 | | | | | | | | | |
28‑May‑1990 | Roland Garros | Clay | R64 | 5 | 136 | (3)Agassi d. (Q)Todd Woodbridge [AUS] | 7-5 6-1 6-3 | | | | | | | | | |
28‑May‑1990 | Roland Garros | Clay | R128 | 5 | 122 | (3)Agassi d. Martin Wostenholme [CAN] | 4-6 7-6 6-0 6-1 | | | | | | | | | |
7‑May‑1990 | Hamburg Masters | Clay | R16 | 4 | 23 | (15)Magnus Gustafsson [SWE] d. (2)Agassi | 7-6 7-6 | | | | | | | | | |
7‑May‑1990 | Hamburg Masters | Clay | R32 | 4 | 109 | (2)Agassi d. (Q)Diego Perez [URU] | 6-1 1-0 RET | | | | | | | | | |
16‑Mar‑1990 | Miami Masters | Hard | F | 5 | 3 | (5)Agassi d. (3)Stefan Edberg [SWE] | 6-1 6-4 0-6 6-2 | (ch) | | | | | | | | |
16‑Mar‑1990 | Miami Masters | Hard | SF | 5 | 9 | (5)Agassi d. (7)Jay Berger [USA] | 5-7 6-1 6-1 | (ch) | | | | | | | | |
16‑Mar‑1990 | Miami Masters | Hard | QF | 5 | 17 | (5)Agassi d. (14)Jim Courier [USA] | 4-6 6-3 6-1 | | | | | | | | | |
16‑Mar‑1990 | Miami Masters | Hard | R16 | 5 | 15 | (5)Agassi d. (12)Andres Gomez [ECU] | 6-7 6-2 6-3 | | | | | | | | | |
16‑Mar‑1990 | Miami Masters | Hard | R32 | 5 | 42 | 6-1 6-3 | | | | | | | | | |
16‑Mar‑1990 | Miami Masters | Hard | R64 | 5 | 112 | (5)Agassi d. Kelly Jones [USA] | 6-1 6-2 | | | | | | | | | |
5‑Mar‑1990 | Indian Wells Masters | Hard | F | 8 | 3 | (2)Stefan Edberg [SWE] d. (6)Agassi | 6-4 5-7 7-6 7-6 | (ch) | | | | | | | | |
5‑Mar‑1990 | Indian Wells Masters | Hard | SF | 8 | 2 | (6)Agassi d. (1)Boris Becker [GER] | 6-4 6-1 | (ch) | | | | | | | | |
5‑Mar‑1990 | Indian Wells Masters | Hard | QF | 8 | 19 | (6)Agassi d. (14)Emilio Sanchez [ESP] | 6-1 7-6 | | | | | | | | | |
5‑Mar‑1990 | Indian Wells Masters | Hard | R16 | 8 | 139 | (6)Agassi d. Michiel Schapers [NED] | 6-4 7-5 | | | | | | | | | |
5‑Mar‑1990 | Indian Wells Masters | Hard | R32 | 8 | 59 | (6)Agassi d. Jimmy Arias [USA] | 6-1 7-6 | | | | | | | | | |
19‑Feb‑1990 | Philadelphia | Carpet | R16 | 6 | 32 | (13)Pete Sampras [USA] d. (3)Agassi | 5-7 7-5 RET | | | | | | | | | |
19‑Feb‑1990 | Philadelphia | Carpet | R32 | 6 | 50 | (3)Agassi d. Jean Philippe Fleurian [FRA] | 2-6 6-0 6-1 | | | | | | | | | |
5‑Feb‑1990 | San Francisco | Carpet | F | 8 | 60 | (2)Agassi d. Todd Witsken [USA] | 6-1 6-3 | | | | | | | | | |
5‑Feb‑1990 | San Francisco | Carpet | SF | 8 | 30 | (2)Agassi d. (5)Jim Grabb [USA] | 6-2 6-2 | | | | | | | | | |
5‑Feb‑1990 | San Francisco | Carpet | QF | 8 | 51 | (2)Agassi d. (8)Paul Annacone [USA] | 6-4 6-2 | | | | | | | | | |
5‑Feb‑1990 | San Francisco | Carpet | R16 | 8 | 68 | (2)Agassi d. Dan Goldie [USA] | 2-6 6-0 6-1 | | | | | | | | | |
5‑Feb‑1990 | San Francisco | Carpet | R32 | 8 | 88 | (2)Agassi d. Ramesh Krishnan [IND] | 6-2 6-7 6-0 | | | | | | | | | |