Lee McCulloch believes Rangers can bounce back from Saturday's Old Firm defeat and go on to win the SPL title.
Scott McDonald's excellent strike clinched a 1-0 victory for Celtic at Ibrox on Saturday.
The result sent Gordon Strachan's side seven points clear of their fierce rivals after 20 games of the season.
However, McCulloch has vowed to keep battling and insisted that Rangers can make up the ground.
"I don't think it's impossible for us to claw back seven points. Celtic did it to us last season," the midfielder, an unused substitute at the weekend, told Rangers' official website.
"We won't stop fighting and we will be back on the training ground working hard for it and believing we can get the points back and hopefully win the title.
"We need big characters but there are a lot of personalities in that dressing room. We need everybody pulling together.
"That won't be a problem but the loud ones need to get louder and the ones who are not so loud need to stand up as well.
"We all need to put an extra yard on to our game."
McCulloch accepts that Rangers may have to avoid defeat for the rest of the campaign if they are to overtake Celtic.
He said: "I think a lot of fans might have chucked it now but in the dressing room, we haven't.
"We still believe we can put a run together and get it back. If they can do it to us, we can do it to them.
"I think we have to look at going unbeaten. We can't afford to drop silly points away from home again.
"Our home record has been good up until Saturday and we will be looking to get that form back.
"We are a good enough team to do it. We believe in each other."