End of the road for Yuvraj in Tests?

Following his exclusion from the third Test against West Indies, has Yuvraj Singh hit a dead end with regard to his Test career? R Kaushik has more in the Deccan Herald.

Is it a lack of technique that has prevented the 29-year-old from nailing down a Test match slot despite eight years and 37 games? Is it a lack of temperament? Of hunger, desire and ambition? Is it the absence of that single-mindedness and unwavering discipline that the five-day game necessarily demands? Or is it just plain bad luck, in the shape of untimely illnesses and injuries?