. "I raced go-karts but of course that stopped when I became a professional footballer.
"This is my hobby and my passion now. It’s too late for me to be a professional racing driver, so I know my level and I know how good I am and I always approach things with joy, with laughter and also focus because it has to be serious too."
Polish keeper Dudek retired in 2011 after four years at Real Madrid Credit: Reuters Fabien Barthez At the age of 36, Barthez took up motorsport professionally in 2008 when he competed in the Porsche Carrera Cup France.
He then entered the French GT Championship, Bioracing Series and the Caterham Sigma Cup France and achieved his first podium finish at the FFSA GT Championship.
In 2014, Barthez went that step further and entered his first 24 Hours of Le Mans race, finishing a credible 29th.
Fabien Barthez took up motor racing when he retired from football Credit: AFP - Getty Barthez during the Test Day of the 80th edition of Le Mans 24 Hours Credit: Getty Images - Getty Barthez spent four years at Old Trafford Credit: AP:Associated Press "I have always been fascinated by motor sport, even when I was playing football. It always intrigued me," Barthez said.
"It’s not like football: you can still be good even when you are 35, which was my age when I stopped playing."
Andre Villas-Boas Portuguese coach Villas-Boas left his job at Shanghai SIPG in November to compete in his first rally, but it all ended in misery.
Andre Villas Boas racing in the Dakar Rally Credit: Getty Images - Getty Villas Boas had to withdraw from the rally after a crash Credit: Handout Villas-Boas' latest job was last year when he was coach of Shanghai SIPG Credit: EPA The 40-year-old had to withdraw from the Dakar Rally when his Toyota Hilux hit a sand dune.
Despite having pain in his spine and back, there was nothing broken.
Before racing, Villas-Boas told the official Dakar Rally website: "The Dakar was in my mind for quite some time.
"Racing runs in the blood of my family and my dream was to do the Dakar one day."
Villas-Boas revealed his love of racing Credit: AP:Associated Press Max Kruse Some players don't even wait until they retire to get involved.
As well as being a highly regarded poker player, Werder Bremen striker Max Kruse launched his own motor racing team earlier this year.
In January, the 29-year-old officially unveiled Max Kruse Racing (MKR) and signed Benjamin Leuchter, who competed with Ferrari's Sebastian Vettel in the junior leagues.
Max Kruse, right, launched Max Kruse Racing earlier this year Credit: PA:Press Association Kruse featuring for Werder Bremen against Eintracht Frankfurt Credit: EPA Whether Kruse will end up on the track as well remains to be seen, but he does have another goal he's aiming for.
"Footballers especially often drive fast cars without being able to control them in borderline situations," he told Bremen's official site.
"With our training program we want to guide you to responsible driving."
Santiago Canizares Santiago Canizares starred for Valencia Credit: EPA They say goalkeepers are a bizarre breed. Santiago Canizares, who represented Spain and played for Real Madrid and Valencia, is the third shot-stopper on the list.
And as you can see from the video above, he may have had the scariest crash of the lot.
In 2016, the 48-year-old hurtled off the road in his Suzuki at the Sierra Moreno Rally in the southern province of Cordoba.
There were fears for his safety but Canizares walked away, simply saying: "This would be the football equivalent of a slide tackle."