Fiat Yamaha rider and current championship leader Jorge Lorenzo has secured pole position on the grid for tomorrow's Mugello GP clash.The 22-year old Spaniard put in a 1'48.987 lap of the Italian circuit to secure the top spot on the time sheets. Ducati Marlboro rider Casey Stoner qualified second, leaving Loris Capirossi to take third for the Rizla Suzuki squad.