2013 BWF World Championships – Men's singles

The men's singles tournament of the 2013 BWF World Championships (World Badminton Championships) was held from August 5 to 11. Lin Dan was the defending champion.

Lin Dan defeated Lee Chong Wei 16–21, 21–13, 20–17r in the final.

Seeds
• Lee Chong Wei (final)

• 🇨🇳 Chen Long (quarterfinals)

• 🇨🇳 Du Pengyu (semifinals)

• 🇹🇭 Boonsak Ponsana (third round)

• 🇯🇵 Kenichi Tago (first round, withdrew)

• 🇭🇰 Hu Yun (third round)

• Nguyễn Tiến Minh (semifinals)

•  Tommy Sugiarto (quarterfinals)

•  Jan Ø. Jørgensen (quarterfinals)

•  Sony Dwi Kuncoro (first round)

• 🇩🇪 Marc Zwiebler (third round)

• 🇭🇰 Wong Wing Ki (first round)

• 🇮🇳 Kashyap Parupalli (quarterfinals)

• 🇨🇳 Wang Zhengming (third round)

•  Chong Wei Feng (third round)

• 🇯🇵 Takuma Ueda (third round)