New York: Naomi Osaka became Japan’s first Grand Slam singles champion after she thumped Serena Williams 6-2 6-4 in a controversial U.S. Open final on Saturday, with the American suffering a mesmerizing meltdown after being handed a code violation.

It was drama-filled conclusion to a final that was rich with storylines but will now go down as one of the most controversial Grand Slam finals of all time.

There was much riding on the match for both women, with Osaka bidding to become the first man or woman from Japan to lift a Grand Slam singles title and Williams poised to equal Margaret Court’s record of 24 major titles.

In the end it was Osaka making history but on a day of bizarre events her victory will only be a footnote to what is sure to go down as one of the most infamous matches ever played at Flushing Meadows.