Barcelona (AFP) - Barcelona took a huge step towards a fifth La Liga title in seven years with a 2-1 win over Real Madrid thanks to Luis Suarez's stunning strike on Sunday.Here, AFP sports looks at five lessons to be learned heading into the final 10 games of the La Liga season.1. Suarez sinks his teeth into MadridThe Uruguayan made his Barca debut in the first game between these two sides as Madrid ran out convincing 3-1 winners back in October after completing a four-month ban for biting Italian defender