Next season Tottenham are going to play in the Champions League, a competition which is clearly above their level so, in my opinion, the best case scenario for them is to reach the first round of the knock-out stage, that's it. I can't imagine Tottenham at the quarter finals or semifinals. At the same time I expect Tottenham to perform way better in the Premier League, this season they clearly focused on the Europa League, and they won the best.
Yes, UCL is a high-level competition participated by the best teams from the football leagues in Europe. So teams that do not have good performance standards will of course be very easily eliminated in the group stage as well. That is why if Tottenham cannot play better next season, I think it will be very difficult for them to get through the group stage, let alone to the knockout stage. So I personally think that Tottenham needs to bring in some players for all lines at this time. Because Tottenham's back line can be said to be quite weak, because it is proven that Tottenham often concedes goals. Then the midfield I think is much worse than the defense line, because what I see is that the attack flow built by Tottenham's midfielders is often less effective, that is why Tottenham sometimes has difficulty building sharp attacks. Then in the front line it is also the same, the strikers are less able to find a good place and often waste the opportunities available. That is why, I think Tottenham really needs to buy new players for next season, so that they can compete better in the UCL or in the English league.