Former champion Serena Williams pulls out of US Open . Williams has not recovered from foot injuries she picked up after stepping on broken glass . She sustained the original injury after standing on broken glass at a restaurant shortly after winning her second grand slam of the year and 13th of her glittering career . Williams has not recovered since winning Wimbledon for the fourth time in July .
Former champion Serena Williams pulls out of US Open . Williams has not recovered from foot injuries she picked up after stepping on broken glass . Williams has not recovered since winning Wimbledon for the fourth time in July .