The Frenchman was on hand to give his side a 1-0 victory over Norwich City on Tuesday, which moved them four points clear in third-place.
Speaking to the club's website, Loftus-Cheek said of Giroud: "He's really important for us.
"He's a finisher, a poacher in the box, which is what we need at the moment when teams are sitting back and defending against us.
"You always have a chance to sling it in the box and Oli might be there to put it in. Great team player."