Isak has seamlessly filled the void left by Zlatan Ibrahimovic who dramatically returned to international football after a remarkable season at AC Milan, only to be ruled out by injury days before the tournament commenced.
The Blues’ ambitious pursuit of Erling Haaland may prove to be too extortionate even for Russian billionaire Roman Abramovich, so switching their attention to Real Sociedad’s centre forward could prove to be shrewd business.
Leading the line
Isak has scored 17 goals in 34 La Liga appearances this season guiding Real Sociedad to an impressive fifth place finish.
The 21-year-old striker has already appeared 23 times for Sweden, scoring on six occasions, as he looks to lead the next generation taking the baton from Ibrahimovic.
For a striker who is 190cm tall, Isak is refreshingly agile and glides across the pitch with the ball.
A possible reunion
The German boss spent two years at Dortmund, from 2015 to 2017, and handed the then 17-year-old his Dortmund debut.
Tuchel brought Isak on with four minutes to spare in the quarter-final of the DFB Pokal against SF Lotte.
Nonetheless, the Chelsea manager saw something in Isak at the time which could pave an exciting future for the youngster in West London.
However, when Isak signed for Dortmund in 2017 Tuchel admitted to having no involvement in the transfer.