Alexander Donski defeated Benjamin Lock 6-3 6-7 6-4 in the M15 Pretoria 1 semi-final on hard. The upset overturned the form book — Benjamin Lock came in leading the head-to-head 1–0. Alexander Donski claimed a first win over Benjamin Lock in two meetings, levelling the head-to-head at 1–1.
Donski A. came through in three sets.
Alexander Donski beat Benjamin Lock 6-3 6-7(4) 6-4. Umpiry, "Alexander Donski vs Benjamin Lock — M15 Pretoria 1 Semi-final", https://umpiry.com/match/2019-10-05/donski-vs-lock-m15-pretoria-1-sf?utm_source=cite (as of 5 October 2019).