World number three Alexander Zverev has been expelled from the Mexican Open after he struck the umpire's chair with his racket several times following his defeat in a doubles match. Zverev and his partner Marcelo Melo lost 2-6, 6-4, 6-10 to Lloyd Glasspool and Harri Heliovaara in the round of 16. Zverev was the defending champion in the singles event.