Martino accepts they were fortunate to grind out a 1-0 win.
"I see one good thing and one bad thing. The good thing is that derbies are always derbies and they have to be won. It was a risky away game. On the other hand, we still have very difficult (games) that are very important. We have seven finals left and we haven't forgotten about our away game to Valladolid - we don't want to commit the same errors."
He added: "I think it's important for the players to remember where we were six days ago and where we are now."