The France centre forward scored the winner in Sunday's 1-0 win at home to Real Mallorca, notching only his second goal of the season to stake a claim for the striker's role in the absence of the injured Gonzalo Higuain.
Real, seeking their first domestic Cup since 1993, have said they are still looking for an extra striker in the January transfer window, while coach Jose Mourinho has also urged Benzema to work harder for his place in the side.
"What we have to do is let him work in peace," goalkeeper and captain Iker Casillas said of Benzema, who joined from Olympique Lyon for 35 million euros at the end of the 2008-09 season.
"Little by little, everything will work out well."
Left-back Marcelo added: "We have a lot of faith in him. We are happy he scored and gave us the victory."
Ozil's Germany team-mate Sami Khedira should be available again after injury, the Portuguese coach told a news conference.
Sevilla warmed up for Wednesday's match with a 4-1 home win over promoted Levante, which included a hat-trick for Brazil striker Luis Fabiano, his first in La Liga.
"We are extremely motivated," Ivory Coast midfielder Ndri Romaric, who also features in the advert, told reporters.
"Here at home, in front of our own people, we will play another good match and set ourselves up for return leg at the Bernabeu," winger Diego Perotti added.
"The league and the Cup are completely different," he said in an interview with As newspaper published on Monday.
"Almeria will want to make things tough for us so we have no option other than to go out and compete as best we can."
