Daria Kasatkina fought past her good friend Mirra Andreeva to win the Ningbo Open title in China.
Russian fifth seed Kasatkina beat her teenage compatriot 6-0 4-6 6-4 in a scrappy encounter.
Andreeva broke down in tears after the match, having squandered a 3-0 lead in the final set.
However, she was quickly comforted by Kasatkina, before joking: “I really tried not to cry because I knew the pictures would be ugly but I just couldn’t help myself, I’m sorry guys.”
World number 11 Kasatkina looked to be cruising after making just two unforced errors in a dominant opening set.
Andreeva, 17, produced a stirring comeback and looked in control after winning the first three games of the deciding set.
But Kasatkina capitalised on a series of unforced errors, winning five games in a row before serving out victory.
Andreeva, who reached the semi-finals of the French Open this year and claimed doubles silver at the Olympic Games in Paris, had been bidding for a second career singles title.
Kasatkina, meanwhile, had lost four singles finals this year – with Andreeva jokingly congratulating her for “finally closing one out”.
“Thanks for reminding me that I lost so many finals this year,” Kasatkina said afterwards.
And she added: “Congratulations on the final, I saw you crying but you are going to make a lot of them. I hope we will share some more of them in the future.”
It is a second title of the year for Kasatkina after winning Eastbourne in June and the eighth singles triumph of her career.