Australian Open hopeful Nick Kyrgios played down another injury scare after his Hopman Cup win over Adam Pavlasek in Perth Tuesday. Kygrios appeared hampered by a left knee problem during the singles match, in which he beat Pavlasek 7-5, 6-4 to temporarily keep Australia's title defense hopes alive in the mixed teams tournament before it was snuffed out by the Czech Republic. But Kyrgios was at pains to play down talk of any lingering problems, saying the knee wasn't a major issue. The 21-year-old also had his left lower leg strapped in his first-up win over Feliciano Lopez on Sunday, but said at the time it was due to a recent injury sustained playing basketball. After Kyrgios' win, Lucie Hradecka - a late call-up to replace the injured Petra Kvitova - levelled the tie with an upset win over the misfiring Daria Gavrilova. The Czech is ranked 166 in the world, while Kyrgios teammate Gavrilova is 25th, but it was the Czech who had all the answers, coming from a set down to win 4-6, 6-4, 6-4. Australia then bowed out of final contention when the Czechs clinched the tie in the deciding mixed doubles rubber. That meant the undefeated United States pairing of Coco Vandeweghe and Jack Sock were straight through to the final, which the US has won a record six times. Earlier in the day, Vandeweghe and Sock had notched their second win in as many ties with a 3-0 victory over Spain. Vandeweghe continued her encouraging start to the year with a 6-2, 6-4 win over Lara Arruabarrena in the women's singles, before Sock secured the tie for the Americans with a three-set victory over Lopez, 6-3, 2-6, 6-3. The Americans made it successive clean sweeps in the dead mixed doubles rubber, which meant they couldn't be toppled from the top of their group once Australia lost. Smooth sailing for Radwanska In Shenzhen, top seed and world No. 3 Agnieszka Radwanska made short work of her second round opponent at the WTA Shenzhen Open Tuesday. The Pole disposed of Romania's Sorana Cirstea 6-0, 6-3 in an hour and 18 minutes. Britain's Johanna Konta had a scare of her own against 77th-ranked Vania King of the US, losing the first set 1-6. Konta recovered to prevail 1-6, 6-3, 6-2 in an hour and 35 minutes. But unseeded home player Wang Qiang caused an upset, putting out seventh seed Monica Niculescu of Romania 7-6 (7/1), 6-4. In the day's other singles match, American eighth seed Alison Riske beat Bulgaria's Tsvetana Pironkova 6-1, 6-1.
