
Casper Ruud's Australian Open tune-up has begun impressively, while Petra Kvitova has sealed a first United Cup victory for the Czech Republic by beating Germany's Laura Siegemund in Sydney.
Kvitova's 6-4 6-2 win on Sunday morning gave her country an unassailable 3-0 lead, securing the tie after star German Alexander Zverev was upset by Jiri Lehecka in his comeback from injury a day earlier.