1921 World Hard Court Championships – Men's singles

Men's singles
1921 World Hard Court Championships
Champion	Bill Tilden
Runner-up	Jean Washer
Score	6–3, 6–3, 6–3
Draw	47

The men's singles was one of five events of the 1921 World Hard Court Championships tennis tournament held in Paris, France from 28 May until 5 June 1921. The draw consisted of 47 players. William Laurentz was the defending champion, but lost in the quarterfinals. Bill Tilden became the first American to win the Championship after beating Jean Washer of Belgium in the final.

	Quarterfinals									Semifinals									Final
	Jean Washer		6	6	7
	Jean Borotra		2	1	5
										Jean Washer		7	4	6	6
										Erik Tegner		5	6	1	4
	William Laurentz		4	4	3
	Erik Tegner		6	6	6
																			Jean Washer		3	3	3
																			Bill Tilden		6	6	6
	Bill Tilden		6	6	5	6
	Roger Danet		2	2	7	0
										Bill Tilden		6	6	6
										Nicolae Mişu		3	3	2
	A. Felix Poulin		3	1	6	1
	Nicolae Mişu		6	6	1	6

	First round									Second round									Third round									Quarterfinals
										Jean Washer		w/o
										Jacques Brugnon
																			Jean Washer		6	6	6
																			Jean le Besnerais		2	4	0
										Jean le Besnerais		2	6	3	6	5
										Chatan		6	4	6	4	2r
																												Jean Washer		6	6	7
																												Jean Borotra		2	1	5
										Jean Borotra		6	1	6	4	6
										Manuel de Gomar		1	6	4	6	4
																			Jean Borotra		6	8	6
																			J.T. Baines		1	6	3
										J.T. Baines		6	6	3	6
										Pierre Dufau		4	4	6	2

	First round									Second round									Third round									Quarterfinals
	William Laurentz		6	3	6	6
	Jean Francois Blanchy		0	6	3	2				William Laurentz		6	6	2	5	6
	Manuel Areyzaga		6	6	5	6				Manuel Areyzaga		4	4	6	7	4
	Jacques Samazeuilh		0	4	7	1													William Laurentz		6	2	6	2	6
	Alain Gerbault		3	6	6	6													Umberto de Morpurgo		2	6	1	6	4
	Léonce Aslangul		6	3	0	2				Alain Gerbault		4	3	6	1
	Umberto de Morpurgo		w/o							Umberto de Morpurgo		6	6	2	6
	Bonnetti																											William Laurentz		4	4	3
	Arnold Jones		6	6	6																							Erik Tegner		6	6	6
	Marcel Cousin		0	2	3					Arnold Jones		5	1	4
	Erik Tegner		6	6	2	6				Erik Tegner		7	6	6
	Pablo Debran		2	3	6	2													Erik Tegner		6	2	0	6	6
	Jean Faucamberge		w/o																Arthur Wallis Myers		4	6	6	1	1
	Luis de Olivares									Jean Faucamberge		5	1	1
	Arthur Wallis Myers		6	6	6					Arthur Wallis Myers		7	6	6
	J. d'Espine		2	2	4

	First round									Second round									Third round									Quarterfinals
	Sergei Rodzianko		10	7	6
	de Lieneres		8	5	0					Sergei Rodzianko		6	0	6	5	6
	Jed Jones		6	6	6					Jed Jones		3	6	2	7	3
	Albert Lammens		1	4	1														Sergei Rodzianko		3	0	1
	Walter Crawley		6	6	7														Bill Tilden		6	6	6
	Raymond Rodel		3	1	5					Walter Crawley		6	3	4	5
	Bill Tilden		6	2	6	10				Bill Tilden		4	6	6	7
	Eduardo Flaquer		0	6	3	8																						Bill Tilden		6	6	5	6
	Engmann		w/o																									Roger Danet		2	2	7	0
	Vallejo									Engmann		3	1	3
	Pierre Albaran		w/o							Pierre Albaran		6	6	6
	Frank Hunter																		Pierre Albaran
	R.E. Sherbrooke		6	6	10														Roger Danet		w/o
	F. Rodon		2	2	8					R.E. Sherbrooke		0	2	9
										Roger Danet		6	6	11

	First round									Second round									Third round									Quarterfinals
										Charles Aeschlimann		6	6	6
										Marcel Dupont		1	2	1
																			Charles Aeschlimann		10	6	0	4	3
																			A. Felix Poulin		8	3	6	6	6
										A. Felix Poulin		6	7	4	6
										Blanc		2	5	6	3
																												A. Felix Poulin		3	1	6	1
																												Nicolae Mişu		6	6	1	6
										Nicolae Mişu		6	11	6
										André Gobert		3	9	3
																			Nicolae Mişu		6	9	6
																			Jose Maria Areyzaga		2	7	2
										Jose Maria Areyzaga		3	6	6	6
										Pierre Hirsch		6	2	0	4