Collina said Hungarian referee Viktor Kassai and his assistants would play no further part in the tournament, but no blame was attributed to the referee. Collina said Kassai would have found himself under too much pressure if he had stayed.
Collina and UEFA executives faced hostile questioning about Tuesday's decision and the use of goal-line technology, which is being tested by FIFA.
UEFA said that of 302 close decisions made by referees in the 24 matches so far, 289 of them were correct and 13 incorrect, a 95.7 percent accuracy rate.
"That's a huge result, even though we must still improve," Collina said.
Additional assistant referees, a UEFA experiment to improve refereeing decisions, had contributed to 16 referees' decisions at the tournament and 15 of them were correct.
"One was wrong," Collina said. "It was a human mistake made by a human being. Of course, it would be better if this was not the case."
If the goal had been awarded, Ukraine would have tied the score at 1-1. That wouldn't have been enough to advance to the quarterfinals, but it would have given the Ukrainians a better chance of achieving the win they needed. With the loss Ukraine was eliminated from the tournament.
Toronto sends trio home. Three Toronto FC players arrested Monday for public intoxication outside a Houston nightclub were sent home. Toronto coach Paul Mariner said that Miguel Aceval, Luis Silva, and Nick Soolsma would "not be eligible" for Wednesday's MLS game against the Dynamo.