Singles
1990 ATP Tour World Championships
Final
Champion	Andre Agassi[1][2]
Runner-up	Stefan Edberg
Score	5–7, 7–6(7–5), 7–5, 6–2
Details
Draw	8
Events
Singles Doubles
← 1989 · ATP Finals · 1991 →

Andre Agassi defeated the defending champion Stefan Edberg in the final, 5–7, 7–6^(7–5), 7–5, 6–2 to win the singles title at the 1990 ATP Tour World Championships.^[1]

	Semifinals							Final
	1	Stefan Edberg	6	6
	3	Ivan Lendl	4	2
								1	Stefan Edberg	7	65	5	2
								4	Andre Agassi	5	7	7	6
	2	Boris Becker	2	4
	4	Andre Agassi	6	6

		Edberg	Agassi	Sampras	Sánchez	RR W–L	Set W–L	Game W–L	Standings
1	Stefan Edberg		7–6(7–4), 4–6, 7–6(7–5)	7–5, 6–4	6–7(4–7), 6–3, 6–1	3–0	6–2	49–38	1
4	Andre Agassi	6–7(4–7), 6–4, 6–7(5–7)		6–4, 6–2	6–0, 6–3	2–1	5–2	42–27	2
5	Pete Sampras	5–7, 4–6	4–6, 2–6		6–2, 6–4	1–2	2–4	27–31	3
8	Emilio Sánchez	7–6(7–4), 3–6, 1–6	0–6, 3–6	2–6, 4–6		0–3	1–6	20–42	4

Standings are determined by: 1. number of wins; 2. number of matches; 3. in two-players-ties, head-to-head records; 4. in three-players-ties, percentage of sets won, or of games won; 5. steering-committee decision.

		Becker	Lendl	Gómez	Muster	RR W–L	Set W–L	Game W–L	Standings
2	Boris Becker		1–6, 7–6(7–2), 6–4	4–6, 6–3, 6–3	7–5, 6–4	3–0	6–2	43–37	1
3	Ivan Lendl	6–1, 6–7(2–7), 4–6		6–4, 6–1	6–3, 6–3	2–1	5–2	30–25	2
6	Andrés Gómez	6–4, 3–6, 3–6	4–6, 1–6		5–7, 7–5, 4–6	0–3	2–6	33–46	4
7	Thomas Muster	5–7, 4–6	3–6, 3–6	7–5, 5–7, 6–4		1–2	2–5	33–41	3

Standings are determined by: 1. number of wins; 2. number of matches; 3. in two-players-ties, head-to-head records; 4. in three-players-ties, percentage of sets won, or of games won; 5. steering-committee decision.

• ATP World Tour Finals appearances