Great movie. The boxing scenes were extremely well-done. Christian Bale did a really great job (He probably won't win best supporting actor, but he would be worth of a nomination). Wahlberg was very good and so was Amy Adams. Very interesting story and very well-done all around. Best sports movie in a while IMO.
You should check out The Damned United and Looking For Eric, both of which were released over the last two years and soccer films. Looking For Eric isn't really oriented around soccer actually, but The Damned United despite its historical inaccuracies (albeit minor except for the climactic scene), is the best sports film I've seen in recent years. Check both out.