Pegula was close to losing to Ekaterina Alexandrova but then made a big comeback to reach the Charleston final.

CHARLESTON, S.C. (AP) _ Results Saturday from Credit One Charleston Open at Family Circle Tennis Center (seedings in parentheses): Jelena Ostapenko, Latvia, and Erin Routliffe (1), New Zealand, def.

Jessica Pegula guaranteed a historic final at the Credit One Charleston Open, ensuring the first all-American final in South Carolina since 1990 after outlasting Ekaterina Alexandrova in three sets.