Jose Mourinho's team host Olympique Lyon on Wednesday aiming to qualify for the Champions League quarter-finals for the first time in seven years after a 1-1 first-leg draw and then follow up with a domestic trip to local rivals Atletico Madrid.
Real have a 100 percent home record this season but captain Iker Casillas (pictured) warned against under-estimating relegation-threatened Hercules.
La Liga's worst travellers with three goals scored, six points and one road victory have achieved something no one else has this season, winning 2-0 in Barcelona in September.
"Our most important game is the one against Hercules because we cannot afford to drop any more points in the league," Real's Spanish international goalkeeper Casillas told reporters.
"Although they may be considered inferior they are fighting for different objectives and beat Barcelona at the Nou Camp. We need to remember that."
Cristiano Ronaldo is likely to recover from a muscle strain but Mourinho may be tempted to rest his leading scorer ahead of next week's games.
"As you can see we have a good squad," said Germany midfielder Ozil while denying the team played better because Ronaldo was out.
"He's a world-class footballer who has won us many games and I hope he recovers soon."
"I have read some reports we might change coaches after the trip to San Sebastian," he told reporters.
"Whatever happens we are not going to change. He is the right coach for this team."
