Krul believes their top four chances will be decided against Stoke.
"We are up there, but if you don't win against Stoke and Wigan, you don't deserve to be up there. We will look at the next two games and hope that we get the results that we need.
"Our attitude is that if we can't beat Stoke, we don't deserve to get into the Champions League.
"We just need to keep the pressure on the top teams. Stoke at home and Wigan away are massive games for us."