Despite managing to shore up the Lilywhites' defence with his switch to a back three last term, Antonio Conte is still on the lookout for a new centre-back before the summer window shuts.
According to journalist Fabrizio Romano - via football.london - Tottenham have now added Simakan to their list of centre-back targets after the 22-year-old enjoyed a productive first season at RB Leipzig.
Simakan came through the youth academy at Strasbourg before sealing a £13.5m move to Leipzig last summer, and he made 40 appearances for the club in all tournaments during his debut season.
The former France Under-20 international - who is still awaiting his first senior cap for Les Bleus - scored one goal and set up one more in that time and started 23 Bundesliga matches to help Domenico Tedesco's side secure a fourth-placed finish.
Simakan also started all six of Leipzig's games in their triumphant DFB-Pokal run and was part of a backline that conceded just two goals in the tournament before beating Freiburg on penalties in the final.
However, the Frenchman's contract at the Red Bull Arena does not expire until 2026, meaning that Leipzig are under no pressure to sell and can play hardball in negotiations with Tottenham.
The agent of Bastoni has affirmed that the Italian will not be leaving San Siro this summer, while Chelsea and Paris Saint-Germain are thought to be in a two-way battle for Skriniar.