Beijing - An emotional Naomi Osaka said that she had atoned for the disappointment of the US Open after beating world number one Ashleigh Barty in the China Open final on Sunday.
Osaka defeated teenage US Open champion Bianca Andreescu and then French Open winner Barty on the way to the fifth crown of her young career.
But Osaka admitted that she had been driven to tears after going down in the first set to Australia's Barty, before powering back to win the final 3-6, 6-3, 6-2.
It has proved successful in a short time but Osaka does not see it as a long-term arrangement.
The beaten Barty said that her slice shot, a major weapon of the Australian's, was "nullified" because of the cool conditions in the Chinese capital.
"I think it's an exciting opportunity for all three of us," she said.
"It feels great because today was for me one of the best matches I've played in my life, I guess," said Thiem, who is ranked fifth in the world.