Jan Lennard Struff defeated Igor Sijsling 7-6 6-4 in the Bratislava CH round of 32 on hard. The upset overturned the form book — Igor Sijsling came in defending last year's semi-final, but Jan Lennard Struff had been the form player, winning 2 of their last 4 on hard.
Struff J. took it in straight sets.
Jan Lennard Struff beat Igor Sijsling 7-6 6-4. Umpiry, "Jan Lennard Struff vs Igor Sijsling — Bratislava CH Round of 32", https://umpiry.com/match/2015-11-09/sijsling-vs-struff-bratislava-ch-r32?utm_source=cite (as of 9 November 2015).