Matheson Klein defeated Isaac Frost 6-4 6-1 in the Australia F3 round of 16 on clay. The upset overturned the form book — Isaac Frost came in leading the head-to-head 1–0. Matheson Klein claimed a first win over Isaac Frost in two meetings, levelling the head-to-head at 1–1.
Klein M. took it in straight sets.
Clay: Klein M. leads 1–0 · Hard: Frost I. leads 1–0
Matheson Klein beat Isaac Frost 6-4 6-1. Umpiry, "Matheson Klein vs Isaac Frost — Australia F3 Round of 16", https://umpiry.com/match/2009-04-27/frost-vs-klein-australia-f3-r16?utm_source=cite (as of 27 April 2009).