Lewis Hamilton sped ahead in Friday's free practice for the Italian Grand Prix as his Mercedes team warned it was ready to drop Hamilton or Nico Rosberg if they do not restrain their rivalry.
The battle between the Mercedes drivers, particularly after Rosberg admitted he was to blame for a crash between the two, has dominated the Formula One world championship.
"We have made it very clear this is an unacceptable scenario for us, actually for both of them," Mercedes team boss Toto Wolff told BBC radio.
"We don't want this to happen ever again and the consequences are very easy.
"If we are not able to manage the two of them following the Mercedes Benz racing spirit then we need to admit that and take decisions and take consequences of having a different line-up probably," Wolff added.
Hamilton, who is 29 points adrift of Rosberg in the title race, was six-tenths of a second clear of McLaren's Jenson Button in the opening free practice, in a clear demonstration of his intent to make up lost ground.
Rosberg was third fastest ahead of two time champion Spaniard Fernando Alonso of Ferrari, Dane Kevin Magnussen in the second McLaren and defending champion Sebastian Vettel in the leading Red Bull.
Vettel's teammate Australian Daniel Ricciardo, winner of three of the last six races, only completed 12 laps before retiring with an engine problem.
Hamilton said Thursday he was uncertain about how hard he can race to beat Rosberg following their clash at the Belgian Grand Prix two weeks ago.
The Briton said the decision of the International Automobile Federation (FIA) not to punish Rosberg had left him uncertain as to how hard they, and other drivers, can race against each other.
Rosberg's admission and apology prompted some observers to suggest that the FIA should have taken action.
But the ruling insisted it would not act retrospectively unless there was new evidence.
"I think the FIA have a really tough job and particularly over the last couple of years they have done an exceptional job on a majority of the calls," Hamilton told an at times tense news conference on where he and Rosberg flanked Ferrari's Fernando Alonso.
"Their problem is that the scenario is always different so the same rule doesn't always apply exactly - sometimes it is difficult to say which rules apply to what situation. It is a good question to be honest. How do we move forward from that?
"Does that mean we can now all say we can race a lot closer and if the guy in front comes off and is out of the race nothing will happen, so they will be more relaxed about it? Or does it mean if it happens again there will be a penalty?
"We are always asking to be able to race. It is hard out there to manoeuvre a car at high speeds without sometimes having contact, but there is a fine lineI don't have the full answer to it," Hamilton said.
Source: AFP
