Who is Zheng Qinwen?  You may not hear of her.  She is a tanned, relatively slender Chinese rising star in tennis, only at 19.  Yesterday she beat the former Grand Slam athlete Ostapenko from Latvia 3-2 in the first round of US Open.  Attached please find the video of the deciding third set of the match.  I hope you would like it. 

https://www.ixigua.com/7137721391041905187?logTag=92c1bd3f6208f31b6351 

The US Open courts are located at Flushing Meadow, Queens borough of New York City, just next to Flushing where you can use Mandarin only all the time without much ado.  So in the match, you could hear much sound were rooting for Zheng with "加油".