Unlike a conventional city marathon course, Monza has been specially selected to optimise a number of factors such as climate, terrain, elevation above sea level and surface. Competitors will run 17 laps of the 2.4km course.
The world record currently stands at 2 hours, 2 minutes 57 seconds, set by Dennis Kimetto in Berlin in 2014.
(Reporting by Toby Davis, editing by Ed Osmond)
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