ACAPULCO: Defending champion Alex de Minaur beat Sebastian Ofner 6-1, 6-3 on Wednesday to reach the quarterfinals at the Mexican Open. The third-seeded de Minaur will face fifth-seeded Stefanos Tsitsipas, who advanced to the quarters of the ATP 500 event with a 6-3, 7-6 (6) win over Flavio Cobolli. De Minaur, a 25-year-old Australian, has 10 ATP Tour titles and Tsitsipas has seven. But the Greek player has never won a 500-level event despite two wins in Masters 1000 tournaments. Tsitsipas is 0-10 in 500 finals, including Acapulco in 2021. De Minaur became the first defending champion in Mexico to reach the quarterfinals since Dominic Thiem in 2017. Earlier, Dominik Koepfer beat eighth-seeded American Frances Tiafoe 6-4, 5-7, 6-1, and Jack Draper reached the quarterfinals with a 6-3, 6-0 win over Yoshihito Nishioka. Draper will face Miomir Kecmanovic, who beat Daniel Altmaier 6-4, 6-4.