Jan Lennard Struff defeated Andrey Rublev 6-1 7-6 in the Roland Garros qualifying round of 64 on clay. The upset overturned the form book — Andrey Rublev came in ranked #23.
Struff J. took it in straight sets.
Jan Lennard Struff beat Andrey Rublev 6-1 7-6(1). Umpiry, "Jan Lennard Struff vs Andrey Rublev — Roland Garros Qualifying Round of 64", https://umpiry.com/match/2016-05-19/rublev-vs-struff-roland-garros-q64?utm_source=cite (as of 19 May 2016).