Organisers of the Fuji 6 Hours have asked to change their late October date after it emerged as the only round Fernando Alonso would have to skip due to a clash with Formula 1's United States Grand Prix.

After competing at the Daytona 24 Hours last weekend, on Tuesday the Spaniard confirmed he would be combining his F1 season with McLaren with a seat at Toyota in the WEC 'superseason' taking place over the next two years.

With the circuit owned by Toyota, clearly, the Japanese manufacturer is keen for their home race to not be the only event the double world champion misses but is facing several hurdles before anything is agreed.

A one week shift is unlikely as seven days later F1 is in Mexico and seven days prior the Super Formula finale takes place at Suzuka while also disrupting other WEC drivers competing in the Petit Le Mans at Road America.

The final decision would also need to come from the FIA, who ratified the official calendar and changed the original date for the reasons above last year.