Sharapova downs Riske in tough test at Shenzhen Open Jan 03, 2018 0 65 12345 AFPShenzhenFive-time Grand Slam champion Maria Sharapova came back from a set down to defeat American Alison Riske at the Shenzhen Open on Tuesday and book a spot in the quarter-finals.Riske, who had been hoping for her first win against the former world number one, proved to be a tough opponent early in the match before the Russian finally overcame her 3-6, 6-4, 6-2 in just under two and a half hours."I'm glad I got this kind of match. Although I would've wanted a quick and easy victory, these are the kind of matches that you need, especially with such a short preparation going into the Australian Open in terms of matchplay,"Sharapova said afterwards."I'm just glad that I came back. She played a really great match and as I said to her at the net, I thought it was a great quality match. In the end, I won it so I have another opportunity to keep going."Despite Riske's early lead, Sharapova hit 34 winners, nearly three times Riske's total.The world number 59 was helped by 11 aces, and managed to save seven out of 10 break points.French Open champion Jelena Ostapenko meanwhile slumped to a shock defeat on Tuesday only days after beating Serena Williams in the American's comeback match.Number two seed Ostapenko of Latvia lost to the big-serving Czech Krystina Pliskova 6-1, 6-4 in just an hour and 20 minutes.Ostapenko had beaten Williams via a super tie-break 6-2, 3-6, 10-5 in Abu Dhabi on Saturday, but she had no answer to the power of Pliskova, identical twin sister of former world number one Karolina. Pages 123456 POST A COMMENT RELATED ARTICLES Federer in fine fettle as Switzerland beat Russia Jan 03, 2018 0 210 Brisbane too hot for Muguruza as Murray also withdraws Jan 03, 2018 0 168 QTF, ExxonMobil Qatar host gala dinner for tennis stars Jan 03, 2018 0 316 Wozniacki cruises in Auckland; other seeds struggle AFP Auckland Top seed Caroline Wozniacki cruised through to the second round of the WTA Auckland Classic on Tuesday but other seeded players struggled in their opening matches of the new year. The third and fourth seeds ..