England rugby hero Matt Dawson and BBC pundit Jonathan Davies locked horns for Sport Relief as they surprised youngsters at a Welsh sports project.
The pair dropped in on ReStart, a Sport Relief-funded project on the outskirts of Cardiff.
The project, which is part of the Safer Cardiff charity, uses sports including rugby and football to bring disadvantaged young people together in a bid to ease tensions and avoid gang-related conflict.
The two Rugby stars met up with children as they took part in a sports programme being held in a leisure centre close to the Ely and Caerau estates.
After showing glimpses of the quick feet and soft hands that made him world famous, Davies said he believed the project was providing a much-needed service.
"This is the second-largest housing estate in Europe, unemployment is high and the kids quite often end up joining gangs.
"Getting them together to take part in days like this helps to address that problem and is what Sport Relief is all about."
Dawson added: "I know from first-hand experience the positive influence sport can have and it's vital that youngsters have access to it.
"On estates like this across the UK, sport has a big role to play in getting people together and easing tensions.
Thanks to Sport Relief funding, ReStart is a shining example of that."
ReStart began as a mobile bus project in 2000 and now boasts up to 60 young people a day taking part in a variety of sporting activities at the club.
As well as being a sporting resource, the bus provides a
safe and trouble free environment in which young people can talk openly about the problems they face and even forge new friendships with people from rival gangs.
ReStart project manager Anna Skeels said: "It's fantastic when role models such as Matt Dawson and Jonathan Davies take such a keen interest in the work we're doing.
Sport Relief, a joint venture between BBC Sport and Comic Relief, raised more than £14m in 2002.
The England rugby World Cup team have already donated £85,000 to Sport Relief to tackle poverty and disadvantage at home and overseas.
The money was raised through an auction at the Zurich England rugby send-off dinner at Twickenham before the England team left for the World Cup in Australia.