Marc Marquez has ended the first day of the Phillip Island MotoGP test on top of the timesheets. The Repsol Honda rider was quick from the start of the day, taking over as fastest in the middle of the day, and holding his advantage until the end.

Valentino Rossi ended the day in second, the Movistar Yamaha rider putting in a late charge along with several other rider, which paid off with a spot behind Marquez, just under two tenths slower than the reigning world champion. Andrea Iannone was third fastest on the 2017 Suzuki GSX-RR, holding off the second Movistar Yamaha of Maverick Viñales. Viñales, who has topped four of the five previous days of testing, was forced to settle for fourth.

Danilo Petrucci was the first Ducati home in sixth, the Pramac rider over three quarter of a second off the pace of Marquez, but faster than Dani Pedrosa, who had briefly led the timesheets early in the day. Factory Ducati rider Andrea Dovizioso took eighth spot, while Marc VDS' Jack Miller was the last rider to get within a second of Marquez at the Australian's home track. Jonas Folger rounded out the top ten, ahead of Jorge Lorenzo on the second Ducati.

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