According to the French agency AFP, the tension is rising between ACM and several of the challengers led by joint series leader Luna Rossa Challenge.

"ACM are putting their interests above those of the challengers," Luna Rossa's Bruno Finzi told AFP. "It should be normal that the challengers are able to decide the organisation of their event".

"It is probably best that we reorganise the whole of the first round all over again," he added.

The challengers were keen to move the start date of the semifinals back but ACM refuses explained Mascalzone Latino's Alessandra Pandarese.

Round two, scheduled to start on Wednesday, is now set for Saturday.

If round-robin one continues until then, some teams want the rest day provided in the original schedule. But others are more concerned with ensuring round two doesn't drag on to the start of the semifinals, due to start on May 14.