Euro 2012: Ukraine goal crossed the line and should have been given says Uefa referee chief Pierluigi Collina Kassai's decision was greeted with dismay in Ukraine on Wednesday, with many claiming the team was denied at least a point. "The result of the match turned on a gross error by the officials who didn't give the Ukrainian goal," Ukraine's Sport-Express newspaper said on its website. And it all happened with five officials, two of whom were in charge of seeing whether a ball crosses the line. The incident has reopened the debate about the introduction of goal-line technology after a series of high-profile cases where goals were either given or disallowed, including against England in the last World Cup two years ago. Fifa boss Sepp Blatter, who is in now favour of technology after opposing it for years, wrote on Twitter: "After last night's match #GLT (goal-line technology) is no longer an alternative but a necessity." That again put him at odds with his counterpart at European football's governing body Uefa, Michel Platini, who told reporters this week that the five officials currently being used in Euro 2012 were enough to prevent any controversial decisions. Collina tried to put the Ukraine incident into context, saying that the five officials system had been trialled successfully over "thousands of matches" in European domestic competitions. "This is the only problem we have had," he said. "It's one negative decision in three years of Champions League and two years of Europa League and 24 matches in the Euro," he told reporters. I would be very happy to know if the same questions would have been asked without yesterday's decision. Collina said the decision was not a reflection on Kassai's overall performance and insisted that officials had a 95.7 per cent accuracy rate in calling offside decisions in the group matches. They included a disputed goal by Spain's Jesus Navas in their 1-0 win against Croatia and two Cristiano Ronaldo goals in Portugal's 2-1 win against the Netherlands. But a goal by Greece in their match against the Czech Republic should not have been disallowed for offside, Collina said, again blaming "human error." Fifa is currently trialling two prototypes of goal-line technology, one from British firm Hawk-Eye, which uses a series of cameras in stadium roofs to track the trajectory of the ball and another from German firm GoalRef, which uses sensors.