Chelsea goalkeeper Thibaut Courtois may just have a flaw in his game after all, he's never experienced the pressure of taking part in a proper penalty shoot-out.
Courtois is arguably world football's most impressive young stopper on current form, possessing the physical presence and razor-sharp reflexes to be trusted as Chelsea's number one ahead of Petr Cech.
The Czech international has one-up on Courtois in the fight to be picked for Sunday's Capital One Cup final though, he's proven himself capable of making a trophy-winning impact by saving penalties when it matters most.
Mourinho has a genuine dilemma
Cech most famously made heroic interventions in the 2012 Champions League final against Bayern Munich, denying Arjen Robben in extra-time then Bastian Schweinsteiger and Ivica Olic in the shoot-out to help the Blues win the competition in the most dramatic fashion possible.
By comparison Courtois a novice in those kind of career-defining situations, but is adamant he's ready for that scenario should in unfold at Wembley this weekend.
Lack of experience could count against him?
When quizzed by The Times about his past experience of penalties Courtois responded: "Just one time — in a friendly tournament with Atletico Madrid.
"That was the only time. But we all work with the goalkeepers’ coach and we do our thing in practice. We will be prepared if it’s going to penalties on Sunday.”
Who will Mourinho pick?
Mourinho has got it pretty much spot on when it comes to his goalkeeping dilemma so far this season, occasionally resting Courtois and getting the best out of Cech when he does fleetingly start.
Cech has kept his council over being moved down the pecking order and deserves huge respect for doing so, but if he's on the bench on Sunday he'll surely find it very difficult to take.
Expect Mourinho to start Courtois though, a man who has already played in a Champions League final and World Cup quarter-final himself at the age of 22.
Chelsea fans, who do you think should start in goal against Spurs on Sunday? Let us know by having your say in the comment box below!