David Strettle from Saracens and Ugo Monye from Harlequins have competed against each other on the field, but the two rugby union players are now set to go head-to-head on the road to find out who among them is the safest driver.
By participating in the challenge, which is part of a promotion for the Premiership Responsible Drinking Weekend, the star players aim to encourage fans to drive safely this festive season.
According to road safety charity Brake, drink drivers are responsible for seven deaths on British roads and a further 28 serious injuries every week.
The greater risk of accidents faced by drink drivers is reflected in car insurance premium payments.
In the 'Safest driver in the Premiership' challenge, the rugby players will undergo rigorous testing under the watchful eyes of expert Metropolitan Police driving instructors.
The testing, which will include challenges on skid pans, reversing vans and cornering safely, will rate the players on control, awareness and skill-all attributes.
David Strettle of Saracens said: "At this time of year with the snow and ice, it's really important to drive responsibly.
"We get to test our rugby skills every day, but not always our driving so I'm looking forward to the challenges with the Met Police and learning new skills on the road."
© Press Association 2010