Sport
Serena’s top ranking under threat at US Open
10 years agoNEW YORK, NY - AUGUST 26: Serena Williams of the United States hits the ball during a practice session prior to the start of the 2016 US Open at the USTA Billie Jean King National Tennis Center on August 26, 2016 in the Queens borough of New York City. Chris Trotman/Getty Images for USTA/AFP
Serena Williams retains top spot in the WTA world rankings Monday heading into the US Open with Angelique Kerber snapping at her heals.
