Japan's Naomi Osaka endured a challenge from Jessica Pegula of the United States in the first round of the China Open on Sunday to keep her Asian swing winning streak alive.The world No. 4 and fourth-seeded Osaka survived a second-set tiebreak to claim a 6-3, 7-6(5) win over the No. 76 American at Beijing's National Tennis Center.She will face either German qualifier Andrea Petkovic or Switzerland's Jil Teichmann in the second round.Osaka smashed 26 winners to Pegula's 10 in their first career matchup, but the 21-year-old's first-serve percentage dropped from 93 percent in the first set to …READ FULL ARTICLE