Andrea Dovizioso is now 58 points behind leader Marquez with eight races left and aims to further close the gap on the runaway championship leader at Silverstone.
Andrea Dovizioso's victory for Ducati trims Spanish MotoGP world champion Marc Marquez's runaway lead to 58 points.
Danilo Petrucci finished eighth in the 2017 and 2018 world championships.
Ducati menjelaskan alat digunakan untuk tujuan penyejukan dan bukan bagi aerodinamik jenteranya seperti didakwa Repsol Honda, Aprilia, Suzuki dan KTM
A stewards panel dismissed protests by Honda, Aprilia, KTM and Suzuki over a clamp attached to the rear wheel of the Ducati bikes and affixed to the swingarm.
The bone of contention is a winglet in front of the Ducati's rear tyre, which the Italian manufacturer says is for cooling purposes but which rivals argue illegally creates aerodynamic downforce.
Gara-gara mempunyai satu alat yang dilihat membuatkan tayar tidak panas kemenangan Ducati dipertikaikan
Petrucci topped the timesheets to set a stunning 1 minute 58.239 seconds early in the final three-day test.
The Ducati driver said his left wrist is "hurting a lot" and that he did not want to take more risks.
Thailand is hosting the MotoGP for the first time, a big win for a country with hopes of one day luring Formula One.
Crew yang mula mengembara sejak 3 April, setakat ini menjelajah 17 negara, termasuk Perancis, Switzerland, Itali, Rusia, Kazakhstan, Myanmar, India dan Thailand.
After success in the Czech Grand Prix, Andrea Dovizioso and Jorge Lorenzo of Ducati are hoping to once again beat Marc Márquez in the Austrian Grand Prix.
Dovizioso led from pole position in a slow-burning race that turned into a wheel-to-wheel thriller, with riders looking to save tyres early on and wary of the threat of rain before setting caution aside.
Lorenzo, who will quit Ducati to join up with Marquez at Honda next season, finished 4.479sec ahead of Marquez, with Rossi at almost 7sec.
Lorenzo, a triple world champion in the top category, is moving to the works Honda team next season after a difficult time with the Italian marque.
Because they're every local driver's pet peeve.
Andrea Dovizioso beat Marc Márquez by 0.027 seconds to win the Qatar Grand Prix.
Teammate Jorge Lorenzo was second while Frenchman Johann Zarco who set an electric pace was third.