In which sport did Björn Borg become famous?

Has anyone seen Borg in his later years? He looks good, but his nose has grown to epic proportions. I watched an interview with him, and I couldn't take my eyes off his nose. When he turns around, I bet he knocks stuff over.

i love tennis 🎾

the picture always gives I away

So weird. My very last question asked what sport McEnroe played.