Isabelle Wallace defeated Diana Sumova 6-0 6-4 in the Nules $10K round of 32 on clay. The upset overturned the form book — Diana Sumova came in leading the head-to-head 1–0, but Isabelle Wallace had been the form player, winning 4 of their last 7 on clay. Isabelle Wallace claimed a first win over Diana Sumova in two meetings, levelling the head-to-head at 1–1.
Wallace I. took it in straight sets.
Isabelle Wallace beat Diana Sumova 6-0 6-4. Umpiry, "Isabelle Wallace vs Diana Sumova — Nules $10K Round of 32", https://umpiry.com/match/2015-11-23/sumova-vs-wallace-nules-10k-r32?utm_source=cite (as of 23 November 2015).