Tennis: Naomi Osaka bows out of Porsche semifinals with muscle pain

Japan's world No. 1 Naomi Osaka withdrew from her Porsche Tennis Grand Prix semifinal on Saturday due to injury.Osaka was due to play Anett Kontaveit, but pulled out of the match against the 15th-ranked Estonian due to pain in her left oblique muscles. The news comes a day after Osaka won a dramatic quarterfinal victory after falling behind 5-1 in the third set.The indoor tournament was Osaka's first of the season on clay, and she indicated she still planned to compete at May's Madrid Open.She said she had felt pain in her left side since the first match but that it became too much when she…READ FULL ARTICLE