Sergiy Stakhovsky defeated Elias Ymer 6-4 6-4 in the UKR vs SWE round robin on hard. The upset overturned the form book — Elias Ymer came in leading the head-to-head 1–0. Sergiy Stakhovsky claimed a first win over Elias Ymer in two meetings, levelling the head-to-head at 1–1.
Stakhovsky S. took it in straight sets.
Stakhovsky S. and Ymer E. faced 3 of the same opponents in the last 12 months. Stakhovsky S. went 3–1 (75%) against them, Ymer E. 1–2 (33%). Only 2 of the comparisons are context-comparable — too few for a conclusion.
Only 3 common opponents — small sample, treat as indicative.
Sergiy Stakhovsky beat Elias Ymer 6-4 6-4. Umpiry, "Sergiy Stakhovsky vs Elias Ymer — UKR vs SWE Round Robin", https://umpiry.com/match/2018-02-02/stakhovsky-vs-ymer-ukr-vs-swe-rr?utm_source=cite (as of 2 February 2018).