There are few worse sights in cricket than a player who has undeniable talent and a proven track record falling apart. History is littered with instances of some truly gifted players losing their way, for one reason or another.
The phenomenon is not limited to one country or culture and seems to be species neutral in that fast bowlers, spinners, batsmen and wicketkeepers are all equally susceptible to the affliction. (Related read: Monty Panesar's marriage ends after secret divorce: report)
The most common cause is a young player being unable to deal with the trappings of success. From being a hard-working performer in domestic cricket, the step up to the next level brings money, which can be managed by specialists, fame, which is irresistible to all but a few, and new friends, who are often attracted not to the player himself but how well he is doing. To come undone at this stage is remarkably easy, but, given that this usually happens when a player is fairly young, there is often the chance to get back on the rails.