Sofia Kenin was in tears on Saturday when she suffered an injury a day before her Japan Open final.

The American recorded big wins over Daria Kasatkina and Katie Boulter to set up a final against top seed Qinwen Zheng on Sunday. And the stakes are high, Kenin hasn’t won a WTA singles event since the Lyon Open in more than four years.

Before the big showdown, Kenin struggled in her women’s doubles semifinal with Bethanie Mattek-Sands. The American pair were 5-2 down to Laura Siegemund and Ena Shibahara in the first set when Kenin decided she could not continue.

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