I don't understand sports, I don't even know if she's talking to the ref. Her reaction to whatever happened in exceptional.
Wow, she really caused a racket.
Turns out The Root is slacking.
https://deadspin.com/sensitive-ref-pushes-serena-williams-to-meltdown-and-ru-1828912450
"A lot of men have done the same thing or worse so let me get away with verbally abusing this chair umpire already!" -Serena 'Needs to Retire' Williams
later admitted coaching