Japan's Naomi Osaka lost a close match to Karolina Pliskova of the Czech Republic in the second round of the Brisbane International tennis tournament on Wednesday.In the battle of former world No. 1s, Pliskova won 3-6, 7-6(4), 6-4 to see off Osaka, who was playing her first WTA Tour event in about 15 months after giving birth to her daughter last July.Pliskova, currently ranked 39th, improved her head-to-head record against Osaka to 4-2."I think for me, even stepping on the court is a personal win because a couple of weeks ago I was even doubting if I could play with everyone," Osaka said."…READ FULL ARTICLE