Williams called chair umpire Carlos Ramos a "thief' and a "liar" for charging her with a point penalty, before ultimately enforcing a game penalty against the American".
The accusations of sexism against Williams clearly has really rankled with Christianson, stating that this is "appalling" and mentioning that she's had blow-ups like this before, usually when she's losing.
"I've never been called for coaching, but the racket abuse, the verbal abuse", Johnson added. "That's just part of the sport".
"I don't think I even thought about feeling sad because there's no experience for me to draw on (from) any other Grand Slam final".
Courier insisted there was nothing to discuss with his team over Ramos.
Alternatively, USTA head Katrina Adams said male players badger "the umpire on the changeovers and nothing happens".
Ramos' next umpiring gig will be at the Croatia vs. US match in the Davis Cup this weekend.
During the final against Osaka, Williams got a warning for violating a rarely enforced rule against receiving coaching from the sidelines.
"I have definitely been thinking about if little kids were watching and they wanted to play tennis too", she said. She has won 23 times grand slam titles and has been ranked number one by the Women's Tennis Association eight times.
A video emerged on Twitter yesterday of a young Osaka setting up a "chopstick competition" with her older sister Mari, where the aim was to see who could place 10 beans into a bowl and then take it out the quickest - with chopsticks!
"He's always been a fair, level-headed guy and made a decision in the heat of the moment. It's because I am a woman, and that's not right". Incensed, Serena, in a classic, bold woman act that usually involves pointing a finger and looking at your subject straight in the eye, boldly told the male umpire "I didn't cheat". Williams claimed Ramos' actions in NY were "sexist" but speaking to BBC Sport yesterday, US Open mixed-doubles champion Murray said: "I think that's a bit far-fetched".
"I want to do well at the Pan Pacific Open and maybe year-end top five - but I'm not putting pressure on myself".
The 51st-ranked Harrison, who was called in as a late replacement for the injured Jack Sock, said the women's final "was a very touchy situation".