Audi has opened up quickest during free practice for the Fuji 6 Hours in Japan, round five of the 2014 FIA World Endurance Championship, with the German firm emerging 1-2 in both FP1 and FP2.

Coming into the weekend looking to consolidate its newly acquired lead in the manufacturers' standings following wins at Le Mans and the Circuit of the Americas, the #1 Audi of Tom Kristensen, Lucas di Grassi and Loic Duval was quickest in both sessions.

Fuji newcomer di Grassi was the driver to set the overall pace in the R18 e-tron, with Marcel Fassler leading the way for the #2 car in second place.

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Porsche snatched the third fastest time with the #14 entry led by Neel Jani, while local manufacturer Toyota ended a conservative opening day in fourth and fifth fastest, the #8 TS040 Hybrid - which will comprise of just Sebastien Buemi and Anthony Davidson this weekend - leading the way, with the #7 machine behind.

G-Drive Racing opened up top in the LMP2 class, ahead of the #37 SMP Racing machine and the KCMG car, the latter having won last time out in the United States.

In the GT classes, Aston Martin were the dominant force, locking out the top three positions with the GTE Pro V8 Vantage of Darren Turner and Stefan Mucke leading the #98 and #96 GTE Am cars.