Snatch.

• 2000 comedy with Jason Statham & Brad Pitt
• Plot: Turkish, an unlicenced boxing promoter, is pulled into trouble when he becomes involved with big-time criminal Brick Top, who wants him to "fix" a fight. Meanwhile, a diamond theft goes down but the 84-karat stone goes missing. This leads Avi, the boss who was supposed to receive the stone, to come to England to search for it, with the help of his cousin, Doug The Head, and Bullet Tooth Tony. As events twist and turn, the two situations blend into one with a chain reaction of events.
• IMDb link