Explanation:

- Pullela Gopichand is widely recognized as a former badminton player and a prominent coach from India. He has made significant contributions to the sport and has been instrumental in nurturing many top Indian shuttlers.

- Option 1, wrestling, is incorrect. Pullela Gopichand is not associated with wrestling.

- Option 2, badminton, is correct. He served as the chief coach of the Indian badminton team as of August 2020 and has played a key role in its development.

- Option 3, judo, is also incorrect. There is no known association between Gopichand and judo.

- Option 4, football, is incorrect. Pullela Gopichand has no known involvement in coaching football.