On this day in 2012, Lionel Messi scored four against Espanyol to break Gerd Muller's record of goals scored in a single season - 67. He ended the season with a total of 73.
Messi in 2011/12:
Ballon d'Or
La Liga - 50 goals
UCL - 14 goals
CWC - 2 goals
UEFA Super Cup - 1 goal
Spanish Super Cup - 3 goals
Copa del Rey - 3 goals