https://thehardtackle.com/transfer-news/2023/09/29/real-madrid-keen-on-son-heung-min/
https://sportsbrief.com/football/49725-real-madrid-ready-snub-mbappe-tottenham-captain-son-heung-min/
If Real Madrid uses Son Heung-min as a plan B for the failure to recruit Mbappe maybe this could be a good option but it looks like Tottenham will ask for quite a large amount of money to price Son Heung-min.
Now Tottenham themselves are performing quite well and if you look at the line-up they already have players who can be said to be perfect and when Son Heung-min leaves I worried that it will affect Tottenham performance next season if they don't immediately look for a replacement for Son Heung-min in their squad.