Serena Williams withdraws from Indian Wells with knee injury (Yahoo Sports)

Serena Williams has withdrawn from her semifinal at the BNP Paribas Open because of a right knee injury. The world’s top-ranked player was set to play third-seeded Simona Halep in the second semifinal Friday night. She was expected to address the crowd on-court after the first semifinal between Jelena Jankovic and Sabine Lisicki. Williams was back at Indian Wells for the first time in 14 years, having ended her boycott that began after she won the title in 2001 as a 19-year-old and was heavily booed.