The next five goal margin for Barcelona would be the epic Cruyff inspired 5-0 win at the Bernabeu in February 1974:
Goalscorers that historic day were Asensi (30, 54); Cruyff (39); Pèrez (65) and Sotil (69). The club and fans would then have to wait until the Dream Team beat their eternal rivals 5-0 at Camp Nou in January 1994. Romário (24, 56, 81); Koeman (47) and Iván Iglesias (86) would get on the scoresheet that day.
Unfortunately for Barcelona, Madrid would return the favour one day short of a full calander year later with a certain future Barcelona star in Luis Enrique scoring for Madrid.
That takes us to the present day and last night's epic win but as well as playing in the Romário Um-Dois-Tres game, Guardiola has his own five star record. That is now five out of five wins in the fixture for Pep. Here's hoping that continues.