Japan's world No. 1 Naomi Osaka advanced to the second round of the Madrid Open on Sunday by beating Dominika Cibulkova in straight sets.Osaka, playing in her first match since withdrawing from April's Porsche Tennis Grand Prix semifinal due to abdominal pain, showed she has returned to top fitness but had to fight hard in the second-set tiebreaker to dispatch the world No. 33 Slovak 6-2, 7-6(6)."I feel good. I don't really have that much pain in my abs so that's always a good sign," she said. "I'm just really happy to be out here and playing against Cibulkova.""She's someone I actually wat…READ FULL ARTICLE
