Serena Williams defeats once bitter rival Martina Hingis 5-3 in World TeamTennis and later calls the Swiss a "cool person."

Williams, who returned to the tour before the Eastbourne tournament and later lost in the fourth round of Wimbledon, played the World Team tennis match for the Washington Kastles. The 13-time Grand Slam champion is currently ranked 172, but says she’s ready to peak again. "I just look at it as 'Why am I not on top right now?'" she told the Albany Times-Union.