Chennai: Japanese qualifier Go Soeda upset defending champion Stanislas Wawrinka of Switzerland 6-4, 6-4 in the Chennai Open quarterfinals on Friday.
The 120th-ranked Soeda broke in the third game of the first set and the ninth game of the second after twice earlier trading breaks with the Beijing Olympics doubles gold medallist.
"He deserved to win, he was playing better and was putting a lot of pressure on," Wawrinka said. "It happens this is just the beginning of the year. You are looking for matches, looking for rhythm, looking to play a good game."