Sloane Stephens will contest the WTA Akron Zapopan Open after opponent Anna Kalinskaya was forced to retire from their semi-final with a back injury.
Kalinskaya had taken the first set comfortably but had started to struggle in the second set, which Stephens won 7-5.
And immediately after the second set had concluded, Kalinskaya came over to shake Stephens' hand while conceding the game.
American Stephens will now play the winner of the other semi-final between Marie Bouzkova (Czech Republic) and Qiang Wang (China).