Last update on. From the section OlympicsTokyo Olympic Games on BBC Dates: 23 Jul-8 Aug Time in Tokyo: BST+8. Listen live on BBC TV, BBC iPlayer and BBC Red Button; Listen live on BBC Radio 5 Live, Sports Extra, and Sounds; Live text and video clips available on BBC Sport app and website.Japanese star Naomi Osaka was forced to withdraw from her home Olympics after Czech Marketa Vondrousova won a straight-set victory in Tokyo.23-year-old Osaka was one of the faces of Games in Tokyo and lit the Olympic cauldron during last week's opening ceremony.The four-time Grand Slam champion couldn't back it up, winning no medal and losing 6-1 6-4 in the third round to world number 42.The world number two said, "I certainly feel like there was pressure for this.""It could be because I have never played in the Olympics before, and the first year it was a little too much."Osaka is the current US Open and Australian Open champion. She had won 25 of 26 previous matches on a hardcourt.After withdrawing from the French Open, Osaka was unable to attend this tournament. She revealed that she had suffered "long bouts of depression" after winning her first Grand Slam title.She said, "I think that I'm happy with how I played and with the break that I had.""I have taken long breaks in the past and have always done well."I don't mean to say that I did not do well right now, but it is clear that my expectations were higher."I feel that my attitude was not that great because it's difficult for me to deal with the pressure. That's what I did in this situation."Osaka had won the first round with impressive results. However, Osaka was looking good for a gold medal bid. Osaka made 32 errors against Vondrousova in a rusty performance.The Czech 22-year old hit 18 wins against 10 unforced mistakes as she converted five out of 11 break points.Osaka's exit follows Ashleigh Barty, the Australian top seed in the first round. The women's singles draw is now open.Elina Svitolina, fourth seed from Ukraine, is the highest-ranked player in the event.In the final eight, Vondrousova will face either Paula Badosa from Spain or Nadia Podoroska of Argentina.
