It never ceases to amaze just how quickly a footballer can go from zero to hero – and vice-versa.
In the unfortunate case of Manchester City and England goalkeeper Joe Hart it's been a rapid transformation from rock-solid, mistake-proof hero to error-prone, confidence-shot-to-pieces zero.
However, that doesn't mean that Hart is a terrible goalkeeper all of a sudden, with no hope of turning things around.
It must be remembered that the England No. 1 is still only 26 years old – a baby in the world of goalkeepers.
Most 'keepers don't peak until their early to mid-thirties, and there's no doubt that Hart will soon bounce back to reclaim his Manchester City place from Costel Pantilimon who, despite being 6ft 8in tall, is not in his team-mate's class.
However, City boss Manuel Pellegrini is reportedly looking at other options. There are some supremely talented goalkeepers out there who could be tempted to join the Citizens – and if one of them was to arrive it would leave Hart facing an uncertain future at the Etihad Stadium.
Presuming this happens – and it might – then Arsenal boss Arsene Wenger will surely be tempted to bring him down to north London.
While Wojciech Szczesny, Arsenal's current No. 1 goalkeeper, has had a few stand-out performances for the Gunners over recent years, we've seen nothing to suggest that he'll ever reach the heights Joe Hart has.
For both Manchester City and England, Hart has produced some exceptional displays, and these eye-catching performances will not have gone unnoticed by Wenger, who has always possessed a good nose for a talented player.
The Frenchman just needs to look at Aaron Ramsey to realise that supporters and the media alike can get a little too carried away. The Wales international has repaid Wenger for years of sticking by him with some remarkable performances this season. There hasn't been a better Premier League player, in fact.
Pellegrini is an excellent coach who will surely not want to lose a goalkeeper of Hart's quality.
But if the Chilean does recruit another first-choice keeper, it'll be time for Wenger to pounce.