P. Gopichand defeated Chen Hong to win the Men`s Singles title at the All-England Badminton Championship in 2001. Chen Hong was a Chinese badminton player known for his skill and technique. It is important to note that Gopichand`s victory in 2001 was particularly significant as it marked the first time an Indian had won the prestigious championship.

Option 2, Ji Xinpeng, is not the correct answer. Ji Xinpeng is a Chinese swimmer and not a badminton player.

Option 3, Hendrawan, is also not the correct answer. Hendrawan is an Indonesian badminton player and although he has had considerable success in his career, he was not the opponent that Gopichand defeated in the 2001 All-England Badminton Championship.

Option 4, Peter Gade, is not the correct answer as well. Peter Gade is a Danish badminton player and although he is known for his achievements in the sport, he was not the opponent that Gopichand defeated in 2001.

In conclusion, P. Gopichand defeated Chen Hong to win the Men`s Singles title at the All-England Badminton Championship in