Manee
Cricketer Of The Year
No it bloody doesn't!and as far as the world cup goes... it like saying you pick one of (Yusaf, Raina, Jadja) as your fifth bowler and he performs well in one series, that still doesn't mean that your attack is good.
If a bowler performs well in one series, he is a good bowler in that series (barring some sort of anomaly). So when someone cites Yuvraj, who performed well, as an example of India's poor attack in the World Cup, they are wrong to do so.