1991 ATP Championship Series, Single Week

Template:Short description Template:Infobox tennis circuit season Script error: No such module "Labelled list hatnote". The 1991 ATP Championship Series, Single Week was a series of tennis tournament that was part of the 1991 ATP Tour, the elite tour for professional men's tennis organised by the Association of Tennis Professionals. It formed the tier below the Grand Slam tournaments.

Results

First-time singles Masters champion.

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Masters	Singles champions	Runners-up	Score	Doubles champions	Runners-up	Score
Indian Wells Singles – DoublesScript error: No such module "Check for unknown parameters".	Template:Flagg Jim Courier	Template:Flagg Guy Forget	4–6, 6–3, 4–6, 6–3, 7–6^(7–4)	Template:Flagg Jim Courier	Template:Flagg Guy Forget Template:Flagg Henri Leconte	7–6, 6–1
	Template:Flagg Jim Courier	Template:Flagg Guy Forget	4–6, 6–3, 4–6, 6–3, 7–6^(7–4)	Template:Flagg Javier Sánchez*	Template:Flagg Guy Forget Template:Flagg Henri Leconte	7–6, 6–1
Miami Singles – DoublesScript error: No such module "Check for unknown parameters".	Template:Flagg Jim Courier	Template:Flagg David Wheaton	4–6, 6–3, 6–4	Template:Flagg Wayne Ferreira Template:Flagg Piet Norval	Template:Flagg Ken Flach Template:Flagg Robert Seguso	5–7, 7–6, 6–2
Monte Carlo Singles – DoublesScript error: No such module "Check for unknown parameters".	Template:Flagg Sergi Bruguera	Template:Flagg Boris Becker	5–7, 6–4, 7–6^(8–6), 7–6^(7–4)	Template:Flagg Luke Jensen Template:Flagg Laurie Warder	Template:Flagg Paul Haarhuis Template:Flagg Mark Koevermans	6–4, 6–3
Hamburg Singles – DoublesScript error: No such module "Check for unknown parameters".	Template:Flagg Karel Nováček	Template:Flagg Magnus Gustafsson	6–3, 6–3, 5–7, 0–6, 6–1	Template:Flagg Sergio Casal Template:Flagg Emilio Sánchez	Template:Flagg Cássio Motta Template:Flagg Danie Visser	7–6, 7–6
Rome Singles – DoublesScript error: No such module "Check for unknown parameters".	Template:Flagg Emilio Sánchez	Template:Flagg Alberto Mancini	6–3, 6–1, 3–0 ret.	Template:Flagg Omar Camporese Template:Flagg Goran Ivanišević	Template:Flagg Luke Jensen Template:Flagg Laurie Warder	6–2, 6–3
Montreal Singles – DoublesScript error: No such module "Check for unknown parameters".	Template:Flagg Andrei Chesnokov	Template:Flagg Petr Korda	3–6, 6–4, 6–3	Template:Flagg Patrick Galbraith Template:Flagg Todd Witsken	Template:Flagg Grant Connell Template:Flagg Glenn Michibata	6–4, 3–6, 6–1
Cincinnati Singles – DoublesScript error: No such module "Check for unknown parameters".	Template:Flagg Guy Forget	Template:Flagg Pete Sampras	2–6, 7–6^(7–4), 6–4	Template:Flagg Ken Flach Template:Flagg Robert Seguso	Template:Flagg Grant Connell Template:Flagg Glenn Michibata	6–3, 6–4
Stockholm Singles – DoublesScript error: No such module "Check for unknown parameters".	Template:Flagg Boris Becker	Template:Flagg Stefan Edberg	3–6, 6–4, 1–6, 6–2, 6–2	Template:Flagg John Fitzgerald Template:Flagg Anders Järryd	Template:Flagg Tom Nijssen Template:Flagg Cyril Suk	7–5, 6–3
Paris Singles – DoublesScript error: No such module "Check for unknown parameters".	Template:Flagg Guy Forget	Template:Flagg Pete Sampras	7–6^(11–9), 4–6, 5–7, 6–4, 6–4	Template:Flagg John Fitzgerald Template:Flagg Anders Järryd	Template:Flagg Kelly Jones Template:Flagg Rick Leach	7–6, 6–4

Tournament details

Key

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Q = Qualifier
WC = Wild card
LL = Lucky loser
Alt = Alternate
ITF = ITF entry
PR = Protected ranking
SR = Special ranking
SE = Special exempt
JE = Junior exempt
JR = Junior Accelerator Programme entrant
CO = College Accelerator Programme entrant
NG = Next Gen Accelerator Program entrant
w/o = Walkover
r = Retired
d = Defaulted