QUOTES-Tennis-Quotes from day seven of the Australian Open

When I hear her voice, it just makes me calm and confident." Serena Williams on having elder sister Venus in the stands to watch her play. * "It is never a good feeling losing a match that you feel you could have changed in one second." Garbine Muguruza on failing to convert two match points before suffering a fourth-round defeat by Naomi Osaka. It's not fun to play, but it's really fun to watch." Naomi Osaka on her quarter-final opponent Hsieh.

Quotes from day seven of the Australian Open tennis championships on Sunday: * "I don't know if I zone out and she's the only one I hear. When I hear her voice, it just makes me calm and confident." Serena Williams on having elder sister Venus in the stands to watch her play.

* "It is never a good feeling losing a match that you feel you could have changed in one second." Garbine Muguruza on failing to convert two match points before suffering a fourth-round defeat by Naomi Osaka. * "I quite like it here. I have an Australian coach. This year I have a hitting partner, he's living Melbourne. We have a lot of fun together." Hsieh Su-wei on her special connection with Australia after reaching her maiden Grand Slam quarter-final.

* "If it was a video game, I would want to select her character just to play as her. Because my mind can't fathom the choices she makes when she's on the court. It's not fun to play, but it's really fun to watch." Naomi Osaka on her quarter-final opponent Hsieh. * "She kind of acts on a whim sometimes, doesn't like to plan too far ahead. Even finding out if I'm going to be helping her or coaching her, I normally only find out a week or two before. She's a free spirit." Coach Paul McNamee on Hsieh's unpredictable personality.

Day seven highlights (Compiled by Hardik Vyas in Bengaluru; Editing by Peter Rutherford )