Rafael Nadal pulls out with injury before Roger Federer semi-final at Indian Wells
- Nadal withdraws from semi-final match with Federer
- Federer, 37, will face either Raonic or Thiem in final
Rafael Nadal withdrew from the BNP Paribas Open on Saturday, done in once again by a knee injury.
He had been set to play longtime rival Roger Federer in the semi-finals.