Zak Brown says Fernando Alonso is only being loaned to Toyota and insists his main focus remains with McLaren.
The Spaniard is set to work with both constructors in 2018 as he splits his time between Formula One and the World Endurance Championship.
Toyota confirmed earlier this week that Alonso would be taking part in all eight different WEC events but some believe he will struggle to balance both commitments.
Brown has played down those fears after stressing that the double world champion will only be loaned to Toyota for races and insists his main focus will remain with McLaren.
“Fernando is effectively restricted to just driving the [Toyota] race car,” Brown said.
“So as far as commercial appearances, sponsor commitments, things of that nature, it is very minimised.
“His relationship with Toyota — he is on loan from us.
“We came to an arrangement with Toyota and that is to allow him to race the car but not to travel the globe having commercial commitments.
“[It’s] everything from minimising his travel, to any potential sponsor conflicts – Toyota don’t have many on there so there aren’t many sitting there today that are a conflict with McLaren.
“But if they do find a partner that is conflicting with McLaren, we couldn’t have Fernando walking around in competing sponsor attire.
“Also, he is a McLaren driver first and foremost, and an F1 driver. When you think of Fernando, you think of him as a McLaren F1 driver first and foremost.”
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