Richard Foster insists Rangers cannot afford to let their standards slip against in-form Kilmarnock in tonight’s Active Nation Scottish Cup clash at Ibrox.
The Scottish champions head into the fourth-round tie hoping for a positive reaction to last week's Old Firm derby defeat to Celtic.
Kilmarnock have been in fine shape recently, with their run of results taking them to fourth in the Clydesdale Bank Premier League, despite being written off as relegation fodder at the start of the season.
Right-back Foster acknowledges the difficult task Rangers face in overcoming the Ayrshire side but maintains the game is one the Light Blues should win.
He said: “I don't think Kilmarnock are ever going to be favourites against Rangers but it will be a very difficult game for us.
“We will have to play as well as we can to win the game. They are probably the in-form team in Scotland just now.
“They've got a lot of quality players and they pass the ball really well and they are a very dangerous team on the break. We will need to be at our best to beat them. You know when you go into cup competitions, you are going to have to beat everyone. You get that in your head and the draw takes care of itself.
Foster has identified former Derry City ace Conor Sammon as Kilmarnock's main threat, with the striker heading into the tie with 15 goals already this season.
He said: “They have a lot of good players but Conor Sammon is in a purple patch at the moment. He is a big, strong boy, he is quick and he can actually score goals as well. It will be a very difficult game. It's a very tough draw for us but it's one we are confident we can win.”