Source: Supplied.

Maverick Viñales (Movistar Yamaha MotoGP) struck back after a tough Catalan GP to top day one at the TT Circuit Assen, by over three tenths after a leap forward in FP2.

The weather threatened in the afternoon after a fully dry FP1, but track conditions remained good enough for the field to improve in the afternoon.

The rider from Roses was followed by Jonas Folger (Monster Yamaha tech 3) on the combined time-sheets as the German rookie impressed once again, with reigning champion Marc Marquez (Repsol Honda Team) shooting back up the order in FP2 to complete the top three overall.

The day began with drama in FP1 as Andrea Dovizioso (Ducati Team) suffered a problem that subsequently brought out the red flag, with teammate Jorge Lorenzo (Ducati Team) and Folger both crashing out in the incident.

Mugello and Barcelona winner ‘DesmoDovi’ nevertheless kept his momentum and form in fine order to go fourth by the end of action, ahead of Cal Crutchlow (LCR Honda Team) completing the top five despite a run off in the afternoon.

The most successful rider on the grid at the TT Circuit Assen, Valentino Rossi (Movistar Yamaha MotoGP), was sixth quickest on day one, with FP1’s fastest Danilo Petrucci (Octo Pramac Racing) for close company in P7.

Rookie sensation Johann Zarco (Monster Yamaha Tech 3) was eighth quickest as Independent Team riders populated a lot of the top 10, ahead of Pull&Bear Aspar’s Alvaro Bautista. Repsol Honda Team’s Dani Pedrosa.

Karel Abraham (Pull&Bear Aspar Team) was in the top 10 in FP1 and ended the day only one place lower in 11th, just pipping 2016 Dutch GP winner Jack Miller (EG 0,0 Marc VDS). Aleix Espargaro (Aprilia Racing Team Gresini), Jorge Lorenzo (Ducati Team) and Scott Redding (Octo Pramac Racing) locked out Friday’s top 15.

With weather more of a question mark for Saturday and qualifying, Friday could prove decisive in the grid for the Motul TT Assen.

EG 0,0 Marc VDS rider Franco Morbidelli struck first in Moto2 at the TT Circuit Assen, in the top five in FP1 before moving up the time-sheets in the afternoon to end the day as Friday’s fastest.

Last year’s Assen winner Takaaki Nakagami (Idemitsu Honda Team Asia) had an impressive opening day in P2, with fellow title hopeful Tom Lüthi (CarXpert Interwetten) fastest in first practice and completing the top three, as Remy Gardner (Tech3 Racing) was 19th.

He’s made a habit of taking pole positions in 2017 and Jorge Martin (Del Conca Gresini Moto3) was the fastest man in Moto3 once again after the first two practice sessions, from Aron Canet (Estrella Galicia 0,0) and Joan Mir (Leopard Racing).