Events at the 2011 BWF World Championships
Singles	men	women
Doubles	men	women	mixed

The men's singles tournament of the 2011 BWF World Championships (World Badminton Championships) was held from August 8 to 14. Chen Jin was the defending champion.
Lin Dan defeated Lee Chong Wei 20–22, 21–14, 23–21 in the final.

	Quarterfinals							Semifinals							Final
	1	Lee Chong Wei	21	21
		Kevin Cordón	7	13
								1	Lee Chong Wei	21	21
								6	Chen Jin	13	9
		Hans-Kristian Vittinghus	17	13
	6	Chen Jin	21	21
															1	Lee Chong Wei	22	14	21
															2	Lin Dan	20	21	23
	7	Nguyễn Tiến Minh	21	19	13
	3	Peter Gade	17	21	21
								3	Peter Gade	24	7	15
								2	Lin Dan	22	21	21
	11	Sho Sasaki	14	16
	2	Lin Dan	21	21

	First Round							Second Round							Third Round							Quarterfinals
	1	Lee CW	21	21
		T Saensomboonsuk	15	17				1	Lee CW	21	21
		V Lång	21	21					V Lång	10	11
		DH Rumbaka	17	18											1	Lee CW	21	21
	9	Park S-h	21	21											9	Park S-h	10	5
		Hsueh H-y	15	15				9	Park S-h	21	21
		Shon W-h	21	21					Shon W-h	14	10
		J Maliekal	12	8																		1	Lee CW	21	21
	5	Chen L	19	21	25																		K Cordón	7	13
		K Cordón	21	8	27				K Cordón	21	21
		C Baxter	8	19					H Hurskainen	19	17
		H Hurskainen	21	21												K Cordón	21	19	21
	14	M Zwiebler	21	21												P Abián	19	21	17
		V Atrashchenkov	19	10				14	M Zwiebler	17	21	22
		Y Tan	21	17	15				P Abián	21	7	24
		P Abián	16	21	21

	First Round							Second Round							Third Round							Quarterfinals
	4	T Hidayat	21	21
		R Pacheco	17	6				4	T Hidayat	17	14
		D Wong	22	19	21				D Wong	21	21
		P Wacha	20	21	17											D Wong	16	10
	16	Hu Y	22	18												H-K Vittinghus	21	21
		H-K Vittinghus	24	21					H-K Vittinghus	21	21
		M Lo Ying Ping	21	21					M Lo Ying Ping	8	14
		S Pongnairat	13	15																			H-K Vittinghus	17	13
	6	Chen J	21	21																		6	Chen J	21	21
		R Must	8	10				6	Chen J	21	21
		S Wojcikiewicz	12	9					D Palyama	13	17
		D Palyama	21	21											6	Chen J	18	21	21
	15	K Tago	12	19												A Jayaram	21	12	11
		A Jayaram	21	21					A Jayaram	21	21
		M Matejka	10	6					V Ivanov	19	17
		V Ivanov	21	21

	First Round							Second Round							Third Round							Quarterfinals
		Hsieh Y-h	7	9
		Wong CH	21	21					Wong CH	13	18
		E Pang	21	17	10			10	B Ponsana	21	21
	10	B Ponsana	12	21	21										10	B Ponsana	11	15
		K Parupalli	21	23	21										7	Nguyen TM	21	21
		D Domke	13	25	11				K Parupalli	22	21	20
		M Zilberman	10	14				7	Nguyen TM	24	17	22
	7	Nguyen TM	21	21																		7	Nguyen TM	21	19	13
		P Koukal	5	8																		3	P Gade	17	21	21
		D Zavadsky	21	21					D Zavadsky	19	8
		P Martins	10	14				13	S Santoso	21	21
	13	S Santoso	21	21											13	S Santoso	18	21	14
		K Mehrabi	18	12											3	P Gade	21	14	21
		S Pukhov	21	21					S Pukhov	5	9
		R Ouseph	8	18				3	P Gade	21	21
	3	P Gade	21	21

	First Round							Second Round							Third Round							Quarterfinals
		A Casey	16	10
		T Penty	21	21					T Penty	13	13
		B Leverdez	21	12	11			11	S Sasaki	21	21
	11	S Sasaki	19	21	21										11	S Sasaki	10	24	21
		D Paiola	13	9											8	Du PY	21	22	10
		K Yamada	21	21					K Yamada	12	14
		A Chen	10	21	12			8	Du PY	21	21
	8	D Pengyu	21	16	21																	11	S Sasaki	14	16
		D Snider	16	19																		2	Lin D	21	21
		E Heino	21	21					E Heino	10	7
		Wong WK	17	19				12	Lee H-i	21	21
	12	Lee H-i	21	21											12	Lee H-i	16	13
		S Evans	21	21											2	Lin D	21	21
		M Lahnsteiner	15	16					S Evans	15	16
		K Navickas	11	10				2	Lin D	21	21
	2	Lin D	21	21

• Main Draw