It is important for the club to face this issue, to face this contract with Courtois.
Belgium worldwide Courtois has been the Blues' undisputed number one goalkeeper since returning from a three-year loan spell at Atletico Madrid in 2014 and is garnering interest from Real and Ligue 1 leaders Paris Saint-Germain, according to the Daily Mail.
Butland is regarded as one of the best goalkeepers in Europe and, at 24, has plenty of time to improve.
Butland has been unlucky with injuries in recent months.
Butland has only managed 2 shutouts in 11 league appearances so far this season and is now set to remain out for a couple of weeks with a fractured finger.
Chelsea is yet to agree on an extension for both of the player's contracts as talks stalled over the summer. Chelsea though, are taking a serious look at Butland, especially with Thibaut Courtois not ready to commit to a new deal.
Real Madrid are keenly monitoring the Belgian goalkeeper's situation at Chelsea, with reports suggesting he rejected an initial offer in May.
Former Atletico Madrid loanee Courtois is reportedly holding out for than £200,000 a week, with his current contract due to expire at the end of next season. Jack Butland would boost Chelsea's home-grown domestic quota and would be able to provide more than half-a-decade of top-level football.
Butland is a player that is bound to leave Stoke at some point of time in his footballing career, for a move up the ladder.