Matfield will appear before a SANZAR judicial committee on Monday at Loftus Versfeld in Pretoria where his fate will be decided.
The Springbok vice captain was cited “under Law 10.4 (a) for striking Brumbies flanker Rocky Elsom around the head area in the 16th minute of the match.”
“The Vodacom Bulls lock was also cited under Law 10.4 (k) for charging into a ruck without binding onto another player.”
The Bulls face the Waratahs this Saturday at Loftus Versfeld and could face a potential lock crisis after a neck injury to Danie Rossouw last week and their subsequent loan of Wilhelm Steenkamp to the Sharks.
Matfield’s long time partner Bakkies Botha is also still on the sidelines with an injury and is only due to return next month.