Marketa Vondrousova of the Czech Republic beats Naomi Osaka
                                
                                
                                    (Newser) -
                                    The  host country’s superstar  is out of the Tokyo Olympics. Naomi Osaka lost to former French Open finalist Marketa Vondrousova of the Czech Republic 6-1, 6-4 in the third round of the Tokyo tennis tournament on Tuesday, the  AP  reports. The second-ranked Osaka, who was born in Japan and...