It is not the right time to talk about Tottenham. Because the season has not started yet and we have not seen any of their matches since the end of last season. We cannot predict their performance based on last season's performance, because seasons are different and player changes have an impact on the team. It is also important to see how the players will play with the new team and the new plan.
So I think it is too early to talk about Tottenham. We should at least wait for the season to start and make predictions about them after a few matches. Personally, the round of 16 is very difficult for Tottenham.
Especially in the Champions League, I don't consider Tottenham as a strong team because we can see some of their results from last season, and they aren't even one of the English representatives with the experience or mentality to play in the Champions League. Changes could be made by bringing in some new players, but the pressure Tottenham face in the Champions League will be different from the Premier League.
They were quite poor last season despite winning the Europa League, but when it comes to the Champions League this isn't decisive, because we can see how Atalanta, the previous Europa League champions, struggled in the Champions League.