20-year-old Gueller is currently valued at €60 million. So far this season, he has made 21 appearances for Real Madrid in all competitions, starting 18 times, scoring 3 goals and providing 7 assists.

According to Transfermarkt, Gueller’s value could increase by at least €15 million to €75 million, or even reach €80 million or €90 million, and could even surge by €40 million to €100 million.