Cillessen is second choice at Barcelona to Marc Andre Ter Stegen and is open to a transfer.
However, if we are looking for a less expensive and less risky signing, going for Stoke City's Butland makes more sense than Cillessen given that the Englishman has been playing regular first-team football and is accustomed to the Premier League too.
League rivals Liverpool are also keeping tabs on Cillessen after the Merseyside club saw a shocking performance from Loris Karius in the Champions League final. One potential replacement is Barcelona keeper Jasper Cillessen.
According to reports from Spain, Barcelona are ready to stand firm and are not prepared to sell Cillessen for anything lower than his €60 million (£52m) release clause.
Cillessen made a name for himself during the Netherlands' World Cup run back in 2014.
At Chelsea, Thibaut Courtois's contract standoff has finally ended, with the Blues ending contract talks with the Belgian and his representatives, thus adding wind to the exit rumours that were already rife.
The Gunners manager, Unai Emery has asked the club's board to sign a new goalkeeper this summer.
Spanish newspaper Sport, as quoted by Metro, is reporting that both of the London clubs have approached the Spanish giants to enquire about the availability of the goalkeeper in the summer transfer window.