A Formula One tyre war has been ruled out for the rest of the decade by the latest FIA tyre tender document, which only allows for a single supplier.

Last week Fernando Alonso argued the case for competition between tyre suppliers, which has not been a feature of F1 since 2006 when Bridgestone went up against Michelin. Pirelli's current deal as sole tyre supplier is due to expire at the end of 2016 and the FIA recently opened the tyre tender process for the next contract between 2017 and 2019, with Michelin among rival manufacturers expressing an interest.

"The tender document has come out and that says a single tyre supplier until the end of 2019," Pirelli's Paul Hembery said. "That reflects what the team wants and that's the situation they want to maintain. We don't have anything more to add to that, it [a tyre war] is an academic question that has no real answer because there are so many variables.

"I can't say that we don't want it or that we do because you don't know what parameters you'd be involved with; could you test or would it all be on simulators? How many teams have you got to supply? There are so many variables involved."

Asked if there is potential for the conditions of the tender to change, Hembery added: "No, it won't change."

Toro Rosso boss Franz Tost explained why the teams have little to no appetite for a tyre war.

"This means that two teams will get the good tyres and the rest will just get crap, because like it was before, when Michelin was in, it was Renault and therefore Alonso has good memories and Bridgestone with Ferrari, therefore Michael was so successful - one of the reasons," he said. "If this comes back, it's the same story: the two tyre manufacturers, two teams which get good tyres; three tyre manufacturers, three teams and the rest just get what the others don't like.

"That means the complete competition would drive in a completely different direction. Then we would have, after now the power unit Formula One, we would have the tyre Formula One. Once the power units are stabilised, we open the next problem."