Miyu Kato insists she has left her court rage in New York for good and was gracious in defeat on Sunday after a heartbreaking loss to Kazakhstan's Zarina Diyas in the Japan Women's Open final.

Kato admitted to doing some soul-searching after going berserk following her failure to make the main draw last month at the U.S. Open and paid full credit to Diyas, who denied her a first WTA Tour title with a 6-2, 7-5 win at Ariake Coliseum.

Frustrated at being broken during the second set of a third-round qualifying loss to Sweden's Rebecca Peterson in New York, the 22-year-old whacked a ball clean out of the arena before things escalated after the defeat.