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DALLAS — John Isner has extended his record by winning a 499th career tiebreaker. Isner advanced to the quarterfinals of his hometown Dallas Open with a straight-sets victory over Daniel Altmaier. The big-serving Isner won the final seven points after falling behind 1-0 in the tiebreaker. The fifth-seeded American will face Ecuador's Emilio Gomez, who rallied to oust fourth-seeded Serbian Miomir Kecmanovic in three sets. Top-seeded Taylor Fritz, another semifinalist in the inaugural event last year, joined Isner in the quarters by beating wild-card entry Jack Sock in straight sets.
