McLaren Formula 1 racing director Eric Boullier feels that time is of the essence for the British team as talks continue with Renault and Honda over a 2018 engine supply.

Last weekend's Italian Grand Prix at Monza saw public talks take place between McLaren's bosses and officials from both Renault and Honda, with the team working to resolve its current struggles.

Renault has ruled out supplying four teams in 2018, meaning any engine deal with McLaren would hinge on Toro Rosso agreeing to switch to Honda, with a deadline reportedly being set by Red Bull's B-team of Sunday night.

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No announcement was forthcoming from any party at Monza, but Boullier admitted that McLaren must know what direction it is going in by the time the paddock next convenes in Singapore in two weeks' time.

"I hope so," Boullier said when asked if something would be announced before Singapore.

"We need to know where we go and what we do because there is now a timing issue with the next year’s car design.

"It is complicated because we want the best for F1 and the best for McLaren.

"Whatever will happen, we will all try.

"It is a priority for all the parties in the paddock, including Liberty, to try to make the best of the situation."