Tunisia's Malek Jaziri (world No 56) Friday conceded defeat to German Mischa Zverev (world No 50) 3 sets to 1 (6-1, 4-6, 6-3, 6-0) at the third round of the Australian Open.
Jaziri beat in the first two rounds Japanese Go Soeda (world No 139) and Kazakhstani Alexander Stanislavovich Bublik (world No 207).
