Naomi Osaka was unable to clinch her first title in front of Japanese fans on Sunday, losing in straight sets to Karolina Pliskova in the Toray Pan Pacific Open final.After reaching the tournament decider without dropping a set, the world No. 7's run of dominance at Arena Tachikawa Tachihi ended in a 6-4, 6-4 loss to the eighth-ranked Czech.The 20-year-old Japanese had been gunning for her third WTA title this year following victories at the BNP Paribas Open in March and the U.S. Open earlier this month.Undaunted by the partisan crowd, the 26-year-old Pliskova was willing to mix it up with …READ FULL ARTICLE