#3 Jan Oblak (Atletico Madrid)
The Sun reported in October 2017 that Chelsea would target Atletico Madrid's Jan Oblak, the most expensive goalkeeper in La Liga history if they lose were to lose Thibaut Courtois in summer.
At the age of 24, the Slovenian has plenty of experience of playing in a top league. He was an important member of the Atletico Madrid team that reached the 2016 Champions Leauge final. Despite the fact that since his move to Madrid, the team hasn't really won anything but the former Benfica shot-stopper won back to back Zamora trophies to cement his position as one of the best goalkeepers in the world.
During the transfer window, he attracted interest from Juventus and Paris- Saint Germain but ended up staying at Atletico Madrid, due to a transfer ban that does not allow the Spanish club to field the players they sign in the transfer window. The Slovenian International has admitted that after the end of the ongoing season, he does not know where he will play his football. Oblak has a release clause of 100 million euros.