Toyota's team boss has plainly admitted that the ongoing participation of the Japanese carmaker in formula one is "unclear".
Tadashi Yamashina was earlier quoted by the Yomiuri newspaper as indicating that money, relating to the success of the parent company and also cost-cutting efforts within formula one, are issues to consider.
"We will participate for now," he added. "We have to consider a variety of things in relation to our core business.
"Our participation is unclear, depending on our financial results," said Yamashina.
