The fallout continues from Sunday's Real Madrid Barcelona contest, with a particularly nasty incident standing out.
Sunday's El Clasico match is likely to go down as one of the greatest games in recent years between Real Madrid and Barcelona.
The match had drama, it had controversy, and it had some outstanding footballers on display.
After a collision between Cesc Fabregas and the Portugal international left both players stricken on the floor, an inevitable flare up saw players from both teams engage in a shoving match with each other.
Busquets, eager to get involved, stepped over Pepe, only to bring his foot down early to drag his studs across the Real defender's temple and head.
The incident was easy to miss, but Real goalkeeper Diego Lopez and Busquet's midfield partner Andres Iniesta reacted in the aftermath of the apparent stamp.
Both Busquets and Pepe have been consistent offenders when it comes to foul play and theatrics in Spain's premier club fixture.
The Barca midfielder was accused of racially abusing Marcelo in a Champions League El Clasico only to be cleared by Uefa after they initially charging him.
But if Busquets intended to harm Pepe it is a new low in the ultra competitive grudge match, and is likely to be met with a lengthy ban.