
Real Madrid and Barcelona share a rivalry so fierce in Spain that, if mistakes are made, it could spell the end of a player's career at either club.
The late Francesc Arnau and former Barcelona goalkeeper had to learn that the hard way in 2000, after conceding a piledriver of a free-kick from Roberto Carlos - who ranked at no.90 in FourFourTwo's list of the greatest footballers of all time. Five minutes into the match at the Bernabeu in February of the 1999/00 season, the Brazilian stepped up from a long way out to unleash a deadly strike.