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One of sport's 
 legends played her final 
. Serena Williams bowed out of the US Open on Friday after losing in the 
 round. The 40-year-old showed her 
 grit in her gruelling three-hour match. The 
 erupted in thunderous 
 at the moment of defeat. Tears streamed down Ms Williams' 
 as she showed her 
 to the crowd and waved farewell. In her post-match 
, she said: "I just thank everyone that's here...on my side so many years, decades...literally 
. But, it all started with my parents."