The Welshman is yet to feature from the outset of a Premier League game since making his huge loan move from Real Madrid, with the Portuguese boss explaining after the win over Brighton that Spurs are using the Europa League to get Bale match fit.
He has started both group stage games against LASK and Antwerp.
This past weekend he came off the bench to score the winning goal as Spurs narrowly defeated Brighton 2-1 in the league.
Against Antwerp last week Tottenham lost 1-0, with Mourinho not holding back in his criticism of his players afterwards.
However, he'll likely give a second chance to most of them to impress in Europe.
So, the likes of Dele Alli, Carlos Vinicius, and Steven Bergwijn could still make the starting XI.
The only player currently out injured is defender Japhet Tanganga.