Rafael Nadal withdraws before semifinal with Roger Federer at Indian Wells

INDIAN WELLS — Friday afternoon, Rafael Nadal gutted his way through a men’s quarterfinal match against Russia’s Karen Khachanov at the BNP Paribas Open, battling through an injured right knee to advance to what was expected to be another classic matchup with Roger Federer in Saturday’s semifinals.
It will not happen. Shortly before Saturday’s first semifinal between Milos Raonic and Dominic Thiem began, Nadal withdrew, disappointing both what was expected to be a b