Chelsea left out a crucial clause in Mateo Kovacic’s contract

Chelsea's summer transfer dealings have left plenty of supporters scratching their heads.

It emerged that Chelsea paid over the odds for new goalkeeper Kepa Arrizabalaga, who came within a whisker of joining Real Madrid in January for just £17.9 million. The Blues ended up smashing the world record fee for a 'keeper on Wednesday, when they agreed to splash out £71 million for Kepa to replace the Madrid-bound Thibaut Courtois, who moved for just £35 million. https://twitter.com/AndreasVou89/status/1027158513896890378 The figures involved in the goalkeeping merry-go-round don't make much sense from a Chelsea point of view and the Kepa deal isn't the only curious aspect of their summer business. As part of Courtois' switch to Real Madrid, an agreement was reached for promising midfielder Mateo Kovacic to move to Stamford Bridge on a season-long loan. But, in bizarre circumstances, Chelsea did not include a clause in the Kovacic contract which would enable them to make the deal a permanent one if the Croatian international impresses in the Premier League. The Times reports that Chelsea failed to add an option-to-buy clause in the contract, which is bizarre because it makes it seem like the London club is content to allow one of world's most promising midfield players to develop with them, only to then let him return to his parent club a more complete player. https://twitter.com/eaamalyon/status/1027483939802439680 What appears to be a massive oversight from Chelsea translates to the dream scenario for Real Madrid, however. The La Liga giants have secured the signing of one of the world's top goalkeepers for a fee that looks like a bargain in today's market and, as part of the deal, they get to watch one of their great prospects gain experience at one of the biggest clubs in the Premier League with no fear of losing him for good next summer. Hats off to Florentino Perez.