Agnieszka Radwanska pulls off a major upset on the opening day of tennis ' U.S. Open . Evans , ranked first , beats No . 6 seed Kei Nishikori in straight sets in New York . Venus Williams , Agnieszka Radwanska and Li Na were first -round women 's winners . Daniel Evans will retire after the U.S. Open , putting an end to his 14-year pro career .
Daniel Evans pulls off a major upset on the opening day of tennis ' U.S. Open . Evans , ranked 179th , beats No . 11 seed Kei Nishikori in straight sets in New York . Venus Williams , Agnieszka Radwanska and Li Na were first-round women 's winners . James Blake will retire after the U.S. Open , putting an end to his 14-year pro career .