We have seen several different styles of referees in the opening weekend of the Euro 2012 tournament.
In the first match, the referee, Velasco Carballo of Spain, called a lot of minor fouls early on and then sent off a Greek player after two cautions in the first half. Neither of the incidents looked to be cautionable, especially the second one, where the Polish player simply slipped as he turned in front of the Greek defender. He also sent off the Polish keeper in the second half for a clear DOGSO. The interesting point in this incident is that the Greek player was running diagonally across the penalty area when he was tripped by the keeper, and he may not have been in full control of the ball. By a strict application of US Soccer DOGSO guidelines, known as the 4Ds this incident would not be considered a true DOGSO. However it was very obvious that the Greek forward would have reached the ball, with an open net at which to shoot if he had not been tripped. There was little protest from the keeper nor his teammates. As it was the substitute keeper came on and saved the PK. But the Poles had to play with 10 men so now the sides were even and the Greeks eventually scored to tie the match 1-1.