Mercedes F1 team to act to avoid repeat of Spa 2014 fallout

Newly-crowned three-time Formula 1 world champion Hamilton raised Rosberg's ire with his move at the first corner of Sunday's race, with Rosberg saying his team-mate went "one step too far".

Although it arguably had no bearing on Hamilton's eventual victory, Wolff is concerned at the repercussions.

Suggested to Wolff that the situation had the potential to repeat what followed their Belgian clash 14 months ago, in which Rosberg collided with Hamilton, he replied: "Yes, if we don't take any action.

"It's never easy for things to cool down. It wasn't easy the first time around, but we have some experience.

"We just need to have a calm approach, a firm approach of how we would like them to compete."

Asked about the Austin incident, Wolff said: "It's very hard. Lewis came on the radio and said it wasn't on purpose.

"I think it's something we are going to talk about in a couple of days, but this is the moment to celebrate a world champion who deserves to be world champion.

"Once the emotions have cooled down we will discuss."

As to the prospect of Rosberg treating Hamilton in a different manner from now on, Wolff said: "That danger is, for sure, imminent."

With both constructors' and drivers' titles won for a second consecutive year, the opportunity would ordinarily be there for Wolff to relax for the final three races.

Wolff appreciates, however, the circumstances have changed, adding: "I was just asked how I am going to approach these races.

"I told them I don't know because I have never been in a comfortable situation of being able to sit and watch a race and enjoy it as a fan.

"But it is also a crucial moment now to make sure this race and incident don't release consequences within the team and split the two sides of the garage."