Defender Davinson played under Bosz last year in the Netherlands before he signed for us and the latter was snapped up by Dortmund.
Harry, meanwhile, is keen on adding to his goals haul, having surpassed his century in a Spurs shirt with a brace in Saturday's 3-0 Premier League victory at Everton.
Here's what the lads had to say ahead of the game...
On facing his former manager
“Peter is a good manager and a good person. He always told me I had the quality to have a bright future and he believed in me. He said I trained and played well and would give me confidence all the time, that’s important for a player. I think he will do well at Dortmund, but hopefully not tonight!”
On the potential of featuring in the group stage of the Champions League for the first time
“Of course it is exciting, my first time in the Champions League at this stage and it is the perfect moment for me, the team and the supporters as well. We know the group is difficult but we have quality here and we have a chance to reach the next round."
Thoughts on the match
“This is an important game tonight because we need to start with a win. Wembley is a special stadium to play in, the centre of football in England and we are in front of our own supporters so we want to play well."
Read more from Davinson in the main feature interview in tonight's special edition A4 official matchday programme, on sale at Wembley at £5 for 100 pages.
On scoring in the Champions League
"I’ve scored two in three in the Champions League so far so hopefully I’ll continue that. I try to keep scoring and do the best for Spurs. The most important thing always is to try to win the game and I’ll try to do my job to the best of my ability, as will everyone and we’ll see if we can get the three points."
On Dortmund hotshot Pierre-Emerick Aubameyang
"He’s a fantastic striker who scores goals and makes good runs in behind. We’re different (types of) strikers. He’s had a fantastic last three or four years. Dortmund are a fantastic team with fantastic players but we have to perform on this stage. We want to be known as one of the best teams in Europe and the way to do that is to compete in the Champions League. We have to go out and play our game. It’s a good chance to see where we’re at."
On Dele Alli's absence through suspension
"Of course, Dele’s a big miss. He’s a fantastic player and he’s been fantastic for us, but we’ve got a fantastic squad as well and whoever comes in will be ready to compete on the big stage."
On what we learned from last season's Champions League campaign
"It’s hard to say. We got off to a bad start, which didn’t help. We had to do better at home and that’s something we have to learn from because it’s always hard away from home in the Champions League, whoever you play. That starts tonight. We’re in a tough group but it’s a good test for us and the players are excited to play against the best teams in Europe."