Renowned scout de Visser, who brought Romario and Ronaldo to Europe, has been a personal advisor to Chelsea owner Roman Abramovich since 2005. His role at Stamford Bridge has included overseeing the deals to bring Arjen Robben, Guus Hiddink and Salomon Kalou to London, as well as being the first man to scout former wonderkid John Obi Mikel. The Dutchman has also been instrumental in the formation of the current Chelsea Youth Academy.
Despite his age - de Visser is currently 79 - he is still partly involved with the Netherlands national team, and it was during a training session in Brazil that he revealed his "new crack" - and a potential new target for Jose Mourinho's squad.
Aranguiz, a 25-year old midfielder currently playing for Internacional of Brazil, has been one of the stand-out performers in the Chile side which performed so admirably at the 2014 World Cup before their elimination on penalties to tournament hosts Brazil. A goal and an assist in the 2-0 victory over Spain was his highlight of the tournament, as well as scoring what has been named the greatest penalty ever in the shoot-out with Brazil.
Able to play all through the centre of midfield in both defensive and attacking positions, Aranguiz would fit remarkably well into the double-pivot of the 4-2-3-1 the Chelsea first-team play, whether as the creator next to Nemanja Matic, or as the tigerish ball winner next to the more creative Cesc Fabregas.
However, following Aranguiz's impressive displays at the World Cup, it is likely that Chelsea are not the only club interested, and the fee for any potential deal has increased at an alarming rate. With the increased money in Brazilian football in the modern day, there is no need for clubs to sell on the cheap, and, despite Chelsea willing to spend highly in the past, current Financial Fair Play restrictions mean that the Blues have to complete logical deals, rather than just sign the current big thing.
Yet, considering de Visser's past record, including bringing David Luiz and Ramires to Stamford Bridge, maybe Jose Mourinho should trust the Dutchman's opinions once more.