Celebrity players PokerStars also has a Celebrity team and a Sports team, called respectively "Friends of Texas Hold'em PokerStars" and "SportStars". These include Tennis Pro Rafael Nadal, former tennis champion Boris Becker, Dutch field hockey Olympic Gold medalist Fatima Moreira de Melo, Norwegian cross-country skier Petter Northug, Swedish cross-country skier Marcus Hellner, FIFA World Cup-winning Italian goalkeeper Gianluigi Buffon, former footballer Ronaldo, quantitative analyst and author of the 'Chen Formula' for
Texas Hold'em Bill Chen
Texas Hold'em Bill Chen  and Brazilian auto racer and race team owner Gualter Salles and French rugby union international Sébastien Chabal. Regulated marketsPokerStars.com and PokerStars.eu operate worldwide under licenses from the Isle of Man and Malta governments, respectively. Online Hold'em PokerStars also operates under separate government licenses in Denmark, France, Italy, Belgium, Spain and Estonia. In October 2008, Online Hold'em PokerStars launched PokerStars.it, exclusively for Italian players, which offers real money tournaments in euros in addition to the usual play money games. Online Hold'em PokerStars offers some ring games and tournaments on its main Online Hold'em PokerStars.com site in euros. In March 2010, the site began allowing users to keep their real-money accounts in British pounds and Canadian dollars as well as U.S. dollars and euros.