SYDNEY   - Greg Chappell has criticised Virender Sehwag's work ethic, calling him one of the great frustrations of his time as India coach.  "To say that Viru was one of the great frustrations of my time with the team is an understatement," Chappell wrote. "Sadly, he continues to disappoint and is in danger of squandering his talent. The person who is least likely to be fazed by all of this is  Sehwag himself.”