Oli McBurnie scored twice for the 2-1 win, leaving Martinez pleased as they backed up after Saturday's LaLiga win at Barcelona.
A difficult match:
"We knew what we were getting into. The team made a great effort and adapted to very complex circumstances, on a very small pitch where the ball doesn't move; there's a lot of rubber. The only thing I can fault is that we deserved to do a lot earlier, with very clear chances."
The rival:
"I wasn't surprised by Europa. We had analysed them and it was clear that they were a good team. We made a great effort, they adapted to very complex circumstances because it's a very small pitch, the ball doesn't move because there's a lot of rubber."
Happy with his squad:
"The results of these four days in Barcelona have been extraordinary, with two victories. We have played at a good level and practically all the players have shown their best level. We must continue to grow through confidence. The mentality of the team has been very good."
Rotations:
"I'm very happy with the players who have been playing fewer minutes, they've made a great effort, Oli McBurnie has scored the goal and Jaime Mata has once again given us a lot. Tomorrow we have to recover the players well."