Roger Federer wins opener at Serbia Open . Although she did n't play nearly her best today , I played amazing , so I 'll take it ! '' one -time champion beats Slovenian Petra Kvitova . Federer lowly seventh seed after indifferent today . Caroline Wozniacki and Grega Zemlja come through testing matches .
Roger Federer wins opener at Serbia Open . one -time champion beats Slovenian Petra Kvitova . Federer lowly seventh seed after indifferent today . Caroline Wozniacki and Grega Zemlja come through testing matches .