Hugo Lloris made an alarming blunder against Southampton on Saturday, though Mauricio Pochettino leapt to his defence.
Lloris gifted Saints an equaliser in the first half of Saturday's match when he failed to clear under pressure from Danny Ings, who bundled over with a tackle as the goalkeeper attempted a Cruyff turn.
Luckily for the Frenchman, Spurs went on to win despite Serge Aurier's sending-off, meaning they go into Tuesday's Champions League clash with Bayern Munich having ended a run of three matches without a win.
"You cannot change everything for one mistake"
Despite Lloris seemingly becoming increasingly error-prone over the past couple of years, Pochettino remains unconcerned and is adamant such mistakes stem from his tactics.
"Those things happen in football," Pochettino said on Monday. "You cannot change everything for one mistake. There is no point. It's the same as a striker missing a goal or penalty.
"You saw my reaction. Football is about mistakes. I always tell players they can make mistakes, because I know they are trying [their best]."