Rather than bracing to lose a customer, Cosworth says it is ready to supply engines to a fifth formula one team next year.
The British marque's business director Mark Gallagher played down recent reports that the currently Cosworth-powered Williams or Lotus could be moving to switch to Renault.
Renault has said it is willing to add to its customer engine roster for 2011, but Gallagher told Reuters that he thinks Williams, Lotus, Virgin and HRT are going nowhere.
"The obvious solution is actually the thirteenth team that is coming into formula one," he said.
"My gut feeling is that it is probably a Cosworth/Renault competition to supply (that) team," added Gallagher.
Even if the four Cosworth-powered teams all stay put, Gallagher said the Northampton-based supplier has the capacity to supply a fifth team.
"It certainly wouldn't be a problem to step up to the mark again and do it for next season," he said.