Jorge Lorenzo edges Marc Marquez to top opening practice at the Australian MotoGP Reigning MotoGP world champion Jorge Lorenzo just edged out rookie Marc Marquez to top Friday's opening practice session at the Australian Motorcycle Grand Prix at Phillip Island. JORGE Lorenzo is not ready to give up this year's MotoGP championship to current leader Marc Marquez. Lorenzo outpaced his fellow Spaniard in the opening practice session for this weekend's Australian Grand Prix at Phillip Island on Friday, posting a flying lap of one minute, 29.167 seconds. He narrowly edged out Marquez' 1:29.255, in his first ever ride aboard a premier class bike at the Victorian coastal track. The series' top two riders took advantage of the newly-resurfaced track and clear but cool conditions to close in on the lap record of 1:28.665 set by retired Australian world champion Casey Stoner in 2008. Alvaro Bautista, Dani Pedrosa and Valentino Rossi rounded out the top five fastest. Australian MotoGP rider Bryan Staring finished 19th fastest, while compatriot Damian Cudlin was the morning's slowest in 24th. Marquez holds a commanding 43 point lead over Lorenzo on the season's standings. Ducati rider Yonny Hernandez walked away from this spill 10 minutes into the opening MotoGP practice session for the Australian Motorcycle Grand Prix at Phillip Island. He will only need to outscore his compatriot by seven points in Sunday's race to become the youngest ever MotoGP world champion and first rookie in 35 years to clinch the crown in his debut season. But Lorenzo's showing in practice could make it a hard task for the 20-year-old. Stefan Bradl battled through plenty of pain to complete 11 laps, just days after breaking his right ankle during final practice for the Malaysian GP at Sepang last week. No word on who will replace Bradl if the German declares himself unfit to ride. Meanwhile Australian young gun Jack Miller showed some pace during Moto3 practice clocking the eighth fastest time of the morning. Countryman Arthur Sissis and local wildcard Callum Barker failed to get any decent laps under their belt, with both sliding off the track in separate incidents. TIMES - Tissot Australian Motorcycle Grand Prix, Free Practice 1 (60 minutes) Pos Rider Bike Time/Gap Jorge Lorenzo Yamaha Marc Marquez Honda Alvaro Bautista Dani Pedrosa Valentino Rossi Cal Crutchlow Bradley Smith Nicky Hayden Ducati Randy de Puniet Andrea Dovizioso Andrea Iannone Aleix Espargaro Colin Edwards FTR Kawasaki Hiroshi Aoyama Hector Barbera Danilo Petrucci Ioda-Suter Claudio Corti Yonny Hernandez Bryan Staring FTR-Honda Stefan Bradl Luca Scassa Lukas Pesek Michael Laverty Damian Cudlin