Daniel Ricciardo 'prepared to walk away from Red Bull'

That said, reports state that if Porsche is to buy the team, it will continue to be run by Christian Horner from the same base at present and possibly with the same Adrian Newey-led technical team.

In a not so surprising move, Renault announced Thursday that they will no longer be supplying Red Bull Racing their custom engines after the 2018 Formula One season.

While that stoked fears that Red Bull might be saddled with Honda as their only engine option, Red Bull hinted to Sky Sports that they have "existing relationship" with a motor manufacturer who can hook them up in Renault's place for 2019 that sounds a lot like Aston Martin.

The Austrian team and French engine-maker won four drivers' and constructors' world titles from 2010 to 2013, but they have since fallen behind Mercedes and Ferrari in the pecking order. Porsche LMP Team engineers have been ordered to check the pre-development/concept of a high performance combustion engine.

But, when the Frenchman began to put the pressure on him late in the year, Senna responded at the Portugal Grand Prix by squeezing Prost towards the pit wall.

As far as the rules are concerned, you try to beat the former, and try to help the latter.

The Dutchman was quick to add that he has a good relationship with team-mate Daniel Ricciardo, but his words also reflect the reality of F1 - there is no happily ever after for a pair of team-mates even, or perhaps especially, under the very best of circumstances.

"If Ayrton wants the championship that badly, he can have it", said a fuming Prost after the race.

Renault's Nico Hulkenberg was fifth on the day while it was a positive session for McLaren's Stoffel Vandoorne and Fernando Alonso, who were sixth and seventh.

"He's going to have a child".

The move comes ahead of an announcement today that McLaren will be dropping Honda in favour of Renault- hence the potential partnership between Red Bull and Honda.

The International Automobile Federation (FIA) attempted to ban the use of team orders in 2002, but the sport's governing body retracted the ban in 2011 as teams were continuing to find ways around the rule. Calvin Harris, Ariana Grande and Seal are on the bill this year. "Over the past decade the Singapore race has introduced many innovative elements and become an iconic and highly anticipated event on the F1 calendar", he said.

After opening it, they had their first taste of the fruit.