During the trophy ceremony, Rybakina appeared to refuse to join WTA Tour CEO Portia Archer for a photo opportunity, remaining separate from the group.
The incident follows an earlier ban by the WTA on Rybakina's coach, Stefano Vukov, due to alleged abusive behaviour, although the ban was lifted in August.
Rybakina, who split from Vukov before last year’s US Open, had previously defended him, stating he 'never mistreated' her, and noted that opportunities for conversations with the WTA regarding the investigation “never happened”.
Her victory marked her 11th consecutive win, concluding a strong end-of-season performance after she was the last player to qualify for the tournament.