As Osaka received her trophy after beating Serena Williams in straight sets in the women's singles final, the crowd at Arthur Ashe Stadium actually started booing.
Fresh from pocketing a $3.8 million check from winning the US Open on Saturday, Osaka is now set to pen a clothing deal with the German sports manufacturing giant that could see her take on Williams, the woman she defeated to win the title, for her Forbes number one highest-paid female athlete ranking.
Japanese tennis legend Kimiko Date told AFP it made her "heart ache" to see Osaka reduced to tears and unable to savour her moment of glory.
Osaka appeared on The Ellen DeGeneres Show following her maiden grand slam final win which was overshadowed by Williams becoming embroiled in an epic fight with umpire Carlos Ramos after being slapped with a game penalty for three code violations.
But Murray said of the sexism claims: "I think that's a bit far-fetched".
"Growing up, my dad drove a Nissan, so being able to be a brand ambassador now, it feels like I've come (full circle)", Osaka said at a contract signing event at Nissan's headquarters in Yokohama. "I just never knew when". "Overall I felt really happy and know I accomplished a lot".
No prizes for guessing who won...
"I think for this year my immediate goal would be to get to Singapore", said Osaka after putting herself firmly in contention to reach the season-ending WTA Finals. The brand is always challenging expectations, and I look forward to bringing its vision for driving excitement to new audiences around the world'.
But for now Osaka is itching to do normal stuff - like catch up with big sister Mari, who is also a professional tennis player, go shopping and eat her favourite matcha ice cream. "I would say a championship match in terms of high-level talent on the court between those two ladies".