Heung-Min Son
Spurs attacker Heung-Min Son could get a chance in the team due to the suspension of Alli and would be under immense pressure.
The 25-year-old has looked lightweight in the early start of the season and is yet to register a goal or an assist in his opening four games.
He was a powerhouse attacker last season for the North London club, but looks a shadow of himself right now as he works up to full fitness.
Son could do with a big performance against Dortmund to remind Pochettino of his ability and will be desperate to show his qualities.