V8 Supercar Championship Series leader Marcos Ambrose has "toughened up" for this weekend's season finale at Sydney's Eastern Creek Raceway with a workout with Australian boxing legend Jeff Fenech.
Ambrose, holds a 24-point lead over Holden's Greg Murphy heading into this weekend's VIP Petfoods Main Event, which will involve 150km race on Saturday and a 250km event on Sunday.
In the worst case scenario of Murphy winning both races, Ambrose needs to finish a minimum of fifth in both to claim his first V8 Supercar crown in his Pirtek Falcon.
Reigning champion Mark Skaife is also a mathematical chance, but needs both Ambrose and Murphy to default in at least one of the race to be chance of claiming his sixth title.
Ambrose accepted an offer to join Fenech, a former World Champion in three weight divisions, for a workout in his Marrickville gym.
"Jeff gave me a few pointers, but I don't know of how much use they will be on Sunday," said Ambrose.
"As the referee always says before the start of any major boxing match 'we want a good clean fight'.
"Everyone at Stone Brothers Racing has worked so hard this season with the sole purpose of winning the championship. We need to make sure we do the job at the weekend and achieve our goal.
"It's not going to be easy, but we are ready for it."
Fenech is currently preparing Aussie Danny Green to fight Canadian Eric Lucas for the interim WBC super-middleweight title in Montreal on December 20.
The winner of the fight will do battle with German Markus Beyer for the outright title in the New Year.
Ironically, Green knocked Beyer to the canvas in the opening two rounds of a fight at the famous Nurburgring motor racing circuit in Germany on August 17, but was disqualified for a head-butt at the end of round five.
"Hopefully I will have a little more luck this weekend than the last time Danny was at a racetrack," said Ambrose.
"We had a very positive test at Queensland Raceway on Monday and made some gains in some areas I think will help us this weekend.
"We don't have to win the races at the weekend, but that is exactly what we are going there do.
"We had a good run at Eastern Creek in round three back in May and hopefully we can pick-up from where we left off from."
After the session with Ambrose, Fenech went back to preparing his fighters for a major Fight Night at Sydney Olympic Park on Friday December 12.