Serena Williams retires from Indian Wells

Serena Williams retired from the BNP Paribas Open while trailing Spain's Garbine Muguruza 6-3 1-0 at Indian Wells on Sunday.

Williams walked to the chair after the first game of the second set and sat down, breathing heavily. She and supervisor Donna Kelso had a discussion and Williams retired. (Reporting by Gene Cherry in Raleigh, North Carolina; Editing by Ken Ferris)