
The L-plates are well and truly off for rising American star Learner Tien, who fancies his chances of causing another boilover against Alexander Zverev in the Australian Open quarter-finals.
Courtesy of a straight-sets demolition job on former world No.1 and three-time AO finalist Daniil Medvedev, the 20-year-old Tien has become the youngest man since Nick Kyrgios in 2015 to reach the last eight at Melbourne Park.