Naomi Osaka seals shock US Open title as Serena Williams suffers extraordinary meltdown

Williams accused him of being a thief for taking a point away from her.

Naomi Osaka won her first grand slam title as Serena Williams suffered an extraordinary meltdown.

The headlines were supposed to be about Williams' bid for a record-equalling 24th grand slam title and Osaka trying to become Japan's first slam winner, but instead an argument with umpire Carlos Ramos that escalated dominated the match.