Atletico and Arsenal played out a 1-1 draw in the first-leg of their Champions League semifinal, with the visitors' complaints centred on Ebere Eze's late penalty claim being overturned by VAR.
Oblak remarked afterwards: "It was an intense game from both sides. Both sides were looking for a win but I think we had a good game but at 1-1, there's a lot to decide in London next week.
"There's always relief when a penalty is overturned, I hope I would have stopped it anyway. It was the referee's decision to change it and we agree with him.
"I was close to stopping the first penalty but it was just the power. He hit it with maximum power but it's in the past. We need to focus firstly on the weekend and then to London.
"We will not think about the previous game where we lost 4-0 there. I believe it will be a different game and we will do everything to get a good result and get to the final.
"We don't think about lifting the trophy, first we need to work on the pitch in the second leg. Arsenal want to win the Champions League as well so we need to pass them first."