LONDON, March 3 (Reuters) - Stuttering La Liga leaders Barcelona suffered their second defeat by Real Madrid in five days when they went down 2-1 at the Bernabeu in Saturday's 'Clasico'. However, there was no such slip-up for Manchester United who hammered Norwich City 4-0 to maintain their firm grip on the Premier League or Bayern Munich who stayed 17 points clear in the Bundesliga with a 1-0 win over Hoffenheim. ... More...