The Argentina international picked up a knock in the Champions League win over Bayer Leverkusen in midweek, and his countryman will start instead against Levante on Saturday
The diminutive playmaker suffered a knee ailment in the Mestalla outfit's win over Bayer Leverkusen in the Champions League in midweek, and is expected to be on the sidelines for at least a month.
Ex-Montpellier man Costa will now gain more responsibility in his fellow South American's absence, and knows that it will be hard work to replace Banega's quality but is ready to step up.
"We're two different players," the 26-year-old told AS.
"People ask me to come and take the ball, as Ever does. But that's not my game; I prefer to move faster with a quick pass. Replacing him will be hard work, but I'm ready [for the] challenge.
"This year Ever is doing very well, it's a shame what has happened. If it's my turn to play I will try to give my best," he stated.
Unai Emery's side have a tricky away day against Levante on Saturday, with only two points separating La Liga's third and fourth placed teams.
Costa knows it will be a tough game, but has targeted three points for the visitors.
"If we get three points we move ahead of them, and that's where we want to be on the table," he concluded.