As we are talking about Harry Kane, I can also indicate that Real Madrid would be a good choice for him this summer. We are just making assumptions now of course as we don't even know if he is thinking of leaving even a bit now. He must be enjoying his game under Antonio Conte's great management. If Tottenham weren't able to bring the right manager for the team, I would say that Kane would absolutely leave. But things are different now. As they are going to compete even in the Champions League, he must be happy. On the other hand, a probable offer by Real Madrid might change his mind too.
If Real Madrid seriously makes an offer to him, I think Kane is still possible to leave Tottenham. Since Real Madrid failed to sign Haaland or Mbappe, they may move their target to Harry Kane. They need a CF like Kane, there are not many options for a strong and top CF right now. It is still doubtful about how Kane feels, I am not sure he is quite happy in Tottenham squad although they will play in UCL next season. Tottenham has no good history in UCL, I don't think they target the UCL trophy. It will be different if Kane plays in Real Madrid, Real Madrid always targets to win UCL trophy every season. So, if Kane wants a better achievement, he is better to move to Real Madrid than staying in Tottenham.
I think the history of Real Madrid in the Champions League is enough for Harry Kane to be interested in Real Madrid. After the win in the Champions League final against Liverpool I believe Real Madrid has become a lot more attractive for players. Tottenham is not a team that has a good record in the Champions League. And it also seems highly unlikely that they will be able to win the English Premier League title soon when they have competitors like Liverpool, Manchester City, and Chelsea.