Audi, Porsche and Toyota have racking up considerable mileage this week, with all three LMP1 manufacturers continuing endurance testing for the 24 Hours of Le Mans.
Following its 30-hour endurance test at Paul Ricard last week, Audi is at Monza this week with the low-drag version of its R18 e-tron quattro (pictured above) for a further three-day test at the Italian circuit.
It comes after the Silverstone-winning squad completed more than 4,000 miles in France.
Porsche and Toyota, meanwhile, wrapped up a three-day test at Paul Ricard on Tuesday, with both the 919 Hybrid and TS040 Hybrid completing further mileage in advance of the French endurance classic.
Details on the latest Paul Ricard test has yet to surface.
All three manufacturers will be back in action on the race track next weekend in Belgium for the Six Hours of Spa-Francorhcamps, the second round of the FIA World Endurance Championship.