Can Oncu was quickest during FIM Supersport World Championship Free practice Friday morning at TT Circuit Assen, in The Netherlands. Riding his Pata Yamaha Ten Kate YZF-R9 on Pirelli control tires, the Turkish rider covered the 2.82-mile (4.54 km) road course in 1:37.010, topping the field of 34 riders.

Tom Booth-Amos was the best of the rest with a 1:37.238 on his PTR Triumph Street Triple 765 RS.

Former MotoAmerica Supersport regular Valentin Debise was third with a 1:37.356 on his Eastroc Evan Bros ZXMOTO 820RR.