Atletico Madrid goalkeeper's possible return to Stamford Bridge raises questions for Petr Cech.
There's been a lot of talk about Chelsea's goalkeeping situation this summer... and rightly so.
Most of it, though, has focused on Thibaut Courtois and whether he will, in fact, return to Stamford Bridge from Atletico Madrid or extend his loan period at the La Liga champions by another season.
Less time has been spent assessing exactly what impact that'll have for Chelsea's current no.1 Petr Cech.
At present, Mark Schwarzer's new deal with the club does little to clarify whether Courtois will come back - as the Australian could be a stand-in for either keeper and has proven he can deputise for Cech in the past. From Atletico's point of view, however, new goalkeeping recruits suggest preparations are being made for the 22-year-old's return to England.
So what does that mean for the experienced Cech?
First of all, there is the obvious possibility that the Czech shot stopper will be allowed to leave west London - as Ashley Cole and Frank Lampard have been already this summer. But will Jose Mourinho want to let go of his loyal servant - a man who has won Champions League, Premier League, FA Cup, Europa League and League Cup trophies with the Blues?
Instead, both Cech and Courtois could find themselves in a similar situation to another top European club: Real Madrid.
As Mourinho himself showed during his time at the Bernabeu, the Portuguese coach isn't afraid of bringing in another goalkeeper. But as Carlo Ancelotti showed when he succeeded Mourinho at Madrid, there is a way of handling the both of them.
With Diego Lopez Ancelotti's first-choice goalkeeper for league games, Iker Casillas only made two starts in La Liga last term. The 33-year-old did, however, make nine appearances in the Copa del Rey and 13 in the Champions League. Could Cech and Courtois play out a similar scenario at Stamford Bridge?
With Cech currently out injured, Courtois could potentially be free to start the season as Mourinho's no.1 in the Premier League - but the 32-year-old's return could pave the way for numerous cup and European appearances, giving both goalkeepers plenty to do.
In terms of energy and motivation, Chelsea's assault on all fronts could even be strengthened with two different goalkeepers for different competitions. After all, Madrid won both the Copa del Rey and the Champions League, while their inability to complete a treble cannot be blamed on the form of Lopez, who kept the most clean sheets out of any goalkeeper in Spain during 2014.
Rather than a choice between two top-class goalkeepers, then, Mourinho could have scope to use them both.