The Master's TARDIS (He Jests at Scars...)

In a parallel universe where the Valeyard had defeated the Sixth Doctor, the Valeyard travelled back into his own past in order to stop his fourth incarnation from visiting Logopolis and getting the help of the Monitor to repair the chameleon circuit so he would have the resources of Logopolis to draw on.

The Valeyard's TARDIS time rammed its younger self, but also inadvertently time rammed a version of the Master's TARDIS. (AUDIO: He Jests at Scars)