Sachin Tendulkar has repeated his reservation against the use of the Umpire Decision Review System (UDRS), saying that the technology it uses is not totally accurate. “If we know that it is foolproof … you have to find something that is close to 100 per cent,” he was quoted as saying by .The use of UDRS at the 2011 World Cup has been approved in principle but it is yet to be used in India given the opposition of several Indian players, including Tendulkar and captain MS Dhoni, and the BCCI’s apathy. However, some officials of the BCCI and ICC will travel to Australia to watch the system being used during the upcoming Ashes series.Though impressed with the costly Hot Spot technology, Tendulkar said that he was still not convinced that the overall system was foolproof. “You cannot expect overnight results that can give you 100 per cent, it is quite good but we need to be convinced.”India were part of the first trial of the UDRS during their tour of Sri Lanka in 2008. They struggled with their referrals, getting only one of them right, while Sri Lanka successfully challenged 11 decisions. “There were occasions in the past where we were not convinced at all,” Tendulkar said. “I thought the lines were not correct and that’s my personal opinion.”The team has been reluctant to use the technology since, though Virender Sehwag and Zaheer Khan have expressed their support for the reviews recently.The ICC has maintained that studies have proved the system increases the percentage of correct decision-making from 92% to around 97%.