Even then that might not be enough for the 30-year-old given he is 42 points adrift of championship leader – Ferrari’s Fernando Alonso.

But with nothing to lose, despite knowing he might no longer be F1 world champion come late tomorrow afternoon, it is a relaxed Button who takes on the renowned Interlagos circuit.

“People are obviously concentrating more on the other four,” Button said, referring to Alonso, team-mate Lewis Hamilton and Red Bull duo Mark Webber and Sebastian Vettel.

“It’s a nice position to be in because almost all this season, and obviously last season, it’s been full-on focus, not just me, but a lot of focus on what I do.

“So it’s been nice to be able to relax and just go and do my own thing, and it’s nice to come into this race and be that relaxed, to be able to enjoy it.

“To still be in with a chance of winning the title with two races to go, and to be in the position I am, it’s great.”

Button knows, though, it is a case now of all or nothing, adding: “I know my chance of winning the championship is small. “Because of that I have to go hell for leather, to give it all I can and just enjoy it.

“I have to finish first. There’s no point finishing second because it’s not like I’m racing one other guy.

“I’m racing four others and if one has a bad race, maybe the others won’t, so I’ve really got to win the race.

“It’s going to be very tough around here with both Ferraris, both Red Bulls and my team-mate being competitive, but that has to be the aim.”

Button finished yesterday’s two 90-minute practice sessions down in seventh place, with the gap to Vettel a yawning 1.2 seconds, which does not bode well for the weekend.

“In high speed the car is good, but at low speed I’m struggling for balance and I’ve just no grip, which is something we need to work on,” bemoaned Button.

“It’s not great, but then on higher fuel the car was much better and I was a lot happier, and that’s the important area.

“If the car works well in dry conditions on high fuel then that’s what we want, and tomorrow should be dry.”

Button’s reference to the conditions is due to the fact rain is forecast for qualifying which could throw the situation wide open.

Appreciating his lowly 12th in the wet in Korea two weeks ago when he was unable to get his tyres working, Button added: “That was a pretty bad race for me in the wet.

“But every other race this year in the wet has been pretty good as I’ve won two races in wet conditions, which I enjoy, so hopefully I will get a good car in the wet here.”