No DRS means umpire's word is final for England-India series
System is not being implemented during the five matches, putting more pressure on officials

Something rather strange, by modern standards, will happen when either Australia's Bruce Oxenford or Sri Lanka's Kumar Dharmasena raises his finger in the first test between England and India.
For any batsman seeing the time-honoured signal confirming his dismissal will be unable to challenge the decision, just as the fielding side will have no way of overturning a call of "not out".
That is because the controversial Decision Review System will not be used throughout the five-test series, which starts at Nottingham's Trent Bridge today.
While standardised playing conditions apply during an International Cricket Council tournament such as the one-day World Cup, for bilateral series they are a matter of agreement between the two teams.
Why have only two reviews? It shouldn't be a case of a you having no reviews left and the test match ending with an even bigger howler
And with India responsible for some two-thirds of world cricket's global income, there was never any danger of their wishes being ignored on this tour.