Top seed and defending champion John Isner will play Israel's Dudi Sela in the Atlanta ATP final.
Isner reached his fourth Atlanta final in five years on Saturday with a straight-sets victory over fellow American Jack Sock.
Isner, ranked 12th in the world, broke the unseeded Sock twice en route to a 7-5 6-4 triumph, avenging his quarter-final loss to him at Newport a fortnight ago.
Sela defeated Germany's Ben Becker 6-3 3-6 6-3.
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