Sofia Kenin was in floods of tears on Saturday as she suffered an injury the day before her Japan Open final.

The American notched big wins over Daria Kasatkina and Katie Boulter to set up a finale against top seed Qinwen Zheng on Sunday. And the stakes are high, with Kenin not having won a WTA singles event since the Lyon Open more than four years ago.

Ahead of the big showdown, Kenin hit trouble in her women's doubles semi-final alongside Bethanie Mattek-Sands. The American pair were 5-2 down against Laura Siegemund and Ena Shibahara in the first set when Kenin decided that she could not continue.

With the realisation kicking in that she had not only lost out on the chance to notch another doubles title, but her singles campaign was also in jeopardy, Kenin shed tears on court while Siegemund and Shibahara were handed safe passage to the doubles final.

If the singles final goes ahead, Kenin will need to be at her very best to upset the odds and topple Zheng. Kenin is still ranked outside the world's top 150 while Zheng is up in seventh.

Injuries and struggles for form have seen Kenin tumble down the world rankings from a career-high fourth in March 2020. At that time she was fresh off the back of a red-hot 18 months period in which she won five WTA Tour titles and an Australian Open. Two months later she would lose the French Open final to Iga Swiatek.

Kenin's run to the Japan Open final has come completely out of the blue. Before arriving in Tokyo, the Florida-based competitor suffered back-to-back first-round exits at the Japan Women's Open and the Wuhan Open, which were merely extensions of what has been a frustrating season on the singles circuit.

She battled past three seeded opponents to reach this weekend's final, and it remains to be seen whether she can recover in time to compete.

MORE TO FOLLOW

We'll be bringing you the very latest updates, pictures and video on this breaking news story.

For the latest news and breaking news visit: express.co.uk/sport/football. Stay up to date with all the big headlines, pictures, analysis, opinion and video on the stories that matter to you.

Follow us on Twitter @dexpress_sport - the official Daily Express & Express.co.uk Twitter account - providing real news in real time.

We're also on Facebook @dailyexpresssport - offering your must-see news, features, videos and pictures throughout the day to like, comment and share from the Daily Express, Sunday Express and Express.co.uk.