Slovakia has nothing to lose. They'll leave their lounges and lives on the pitch for sure! Imagine they score the first goal of the game. I can feel the pulse of the Spanish coach going to 120 within seconds!
Spain has only two points to their name, as they have drawn both their matches so far (first one against Sweden, and then against Poland). So in case they have another draw against Slovakia tomorrow, there is a good chance that they will fail to qualify for the knockout phase. But for that to happen, Poland must defeat Sweden (then both the teams and Slovakia will have 4 points each and Spain will have 3). That would be an incredible outcome. One of the tournament favorites finishing at the bottom of their group.
Spain is not what it used to be anymore,their famous attackers like David Villa is not there anymore and Fernando Torres is old enough now,are not capable anymore as they were in the beginning,also Iniesta which was the brain of the midfield is missing,the players which substitute them cannot make the same gameplay and this is what is penalizing Spain so far.However I don't think they will have a problem winning against Slovakia as it will be as a final game of the tournament for them and I think they have the quality in their team to win against Slovakia.