Third Umpires are also players they have come from the game itself. they know that Sehvag is not a bowlerand and when a batsman is bowling in the (test)match,it is always be over appealing and that's what sehvag did. we shouls admire on him that he has helped the team rather criticising the umpires. Umpires are biased in case of round the wicket bowling. when you bowl round the wichet it is always considered that batman will not get LBW. the hokai graph is showing the direction of the ball but the cricket rules and ethicks stand for ever. If shane warne can get wickets from round the wicket not pitching the ball in the line of leg stump than biased umpiring issue gets more relevance not in the sehvag's case.