Re: India's strategy against Mendis?
Well, you can't just try your shot without analyzing his delivery or having any information about which delivery he has bowled out of the stock of so many that he has. I think Dhoni has a point when he said, " The moment **you are able to understand which delivery he has bowled, it is too late to play a big shot". So this **moment seems to come earlier in case of other bowlers (may be because of their grip, style of bowling...etc. which easily help in predicting the bowl they are going to bowl)
If you have a go at him without being able to anticipate the bowl he has bowled, you would simply get out as the bowl might turn out to be "different" than you had anticipated in terms of spin, speed and bounce...etc. That is what Yuvrag might be afraid of before deciding to have a go at him.
We can't compare others with Sehwag, because he is special in a way that he confidently relies on his "instincts" without any fear of getting out. If you want others to play like him, teach them to do the same.