Rangers manager Walter Smith has hailed striker Kenny Miller's return to form.
The 29-year-old forward has been troubled by niggling injuries recently but has put in bright performances in the last week.
He looked lively when coming on as a substitute against Celtic last Sunday before scoring a brace against Forfar in the Scottish Cup in midweek.
Smith said: "I'm pleased for him because he has had an awkward spell recently.
"He had a bit of an injury and was put on a course of exercises and I think we are seeing the benefit of that now.
"When he came on in the Celtic game, and the other night against Forfar, it was as bright as he has been for a while.
"He is coming back to something like full fitness."
Rangers are now just two points behind Celtic at the top of the SPL and Smith believes confidence is increasing all the time.
"I think the team are reasonably confident just now," he said.
"We've been on a decent run over the last few games. We have been playing quite confidently so I hope we can continue that but we get a test as each game comes along."
Gers take on Kilmarnock at Ibrox on Saturday and victory will propel them to the SPL summit for at least a day as leaders Celtic do not play Motherwell until Sunday.
"It's always nice when that happens," said Smith.
"But I don't think there is a great deal of importance in that aspect. What is important, is that we win. That's the most important thing.
"Whether we go top of the league for a few hours or not, doesn't really come into it. It's just the fact that we have to win the games."
Despite heading into the game with confidence, Smith is not underestimating the threat posed by Kilmarnock.
He said: "If you look at the game we had against Kilmarnock in the early part of the season, we were made to work very hard to overcome them.
"I see this being the same type of game.
"The home games are proving to be difficult for us, teams are coming and setting their stall out to defend well and, credit to most of the teams in Scotland, they have been doing that very well.
"It's only been occasionally when we have managed to get a couple of goals early on that the game has opened up.
"Kilmarnock are a team who have had a little bit of inconsistency in their results but they are always capable of getting a result against any of the teams and certainly they have made it very awkward for us in the games we have played.
"We are on a reasonable run and we have been playing quite confidently.
"But we will have to match anything that's gone before if we are to win tomorrow."