Temmosus voiced his surprise at how often apparent defeat could be turned to victory. (TV: The Daleks)
General Staal of the Tenth Sontaran Battle Fleet introduced himself as "Staal the Undefeated", to which the Tenth Doctor pointed out that such a title would no longer be accurate if he did get defeated, joking, that, that would make him "General Staal the Not-Quite-So-Undefeated-Anymore-But-Never-Mind." (TV: The Sontaran Stratagem)
Davros deemed the transference of the Twelfth Doctor's regeneration energy into himself and the Daleks to be the "final defeat of the Time Lords". (TV: The Witch's Familiar)