Last night Portugal's famous forward Cristiano Ronaldo injured in the match with Serbia.
Ronaldo pulled up with what appeared to be a hamstring injury when sprinting after the ball and was substituted in the 31st minute.
After his substitute, Portugal made a draw with Pereira's goal in 42nd minutes.
Portugal got 2 points in 2 matches because they could beat neither Ukraine nor Serbia at home.
Portugal thought they had a penalty when the referee pointed to the spot after the ball hit the outstretched arm of Antonio Rukavina from Andre Silva's close-range header.
However, after conferring with an assistant, the official reversed his decision.