Second-seeded Reilly Opelka won the longest tiebreaker in the history of the ATP Tour to cap a two-set victory Saturday night over No. 3 seed John Isner in the semifinals of the Dallas Open.
Opelka posted a 24-22 tiebreaker victory in the second set to secure his fourth straight triumph over Isner -- 7-6 (7), 7-6 (22). The two combined for 60 aces, with Opelka getting 39, in a match that lasted two hours, three minutes.
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