#3 Jack Butland
Stoke City goalkeeper Jack Butland is one of the first among several names who could replace Courtois between the sticks for Chelsea. Despite just being relegated with the Potters to the Championship, the 25-year-old has shown his capabilities this year - even though there have been some howlers in there too, most notably against Leicester City.
The Blues have had a long-standing interest in the Englishman, and his desire to leave the club could strengthen following their failure to survive in England's top-tier.
Butland would cost Chelsea a British transfer record for a goalkeeper, as it is understood that Stoke would hold out for no less than £30m, which is relatively small for a club of the Blues' stature in today's market.
In 77 Premier League appearances to date, he has kept 20 clean sheets which is a statistic that doesn't make for bad reading considering the circumstances. He also made the most saves of all goalkeepers last term, with 144 in total.