Marcel Felder defeated Juan Ignacio Londero 6-3 7-5 in the Mexico F4 semi-final on hard. The upset overturned the form book — Juan Ignacio Londero came in leading the head-to-head 1–0. Marcel Felder claimed a first win over Juan Ignacio Londero in two meetings, levelling the head-to-head at 1–1.
Felder M. took it in straight sets.
Hard: Felder M. leads 1–0 · Clay: Londero J. leads 1–0
Marcel Felder beat Juan Ignacio Londero 6-3 7-5. Umpiry, "Marcel Felder vs Juan Ignacio Londero — Mexico F4 Semi-final", https://umpiry.com/match/2017-05-15/felder-vs-londero-mexico-f4-sf?utm_source=cite (as of 15 May 2017).