We'll have St Johnstone manager Tommy Wright's thoughts on the quarter-final on the website as soon as possible. I'll call it a day here and thank you, once again, for joining me and for contributing through Twitter, texts and Facebook. All the best.
- Scottish League Cup quarter-final
- FT: Rangers 1-0 St Johnstone (Macleod)
- Three other quarter-finals on Wednesday
We're hearing from Ibrox that goalkeeper Steve Simonsen has been taken to hospital to check on his shoulder injury. It looked like he had bumped his head against the post. Certainly he hit the upright with considerable force. Our best wishes to the keeper.
Of course, should Celtic manage to get through against Partick Thistle tomorrow night, it sets up the possibility of an Old Firm semi-final.
Lewis Macleod celebrates his headed goal for Rangers that puts his team into the last four of the Scottish League Cup.
We're just waiting to speak to St Johnstone manager Tommy Wright at Ibrox. As you may be aware, we won't have any reaction to the match from Rangers boss Ally McCoist. He is continuing his policy of not speaking to the BBC.
Ross Armour: "Great victory for #Rangers in the Scottish League Cup over St Johnstone. Things looking up right now. In Ally we trust #bbcscotfootball."
We'll have highlights of tonight's match on the BBC Sport website later this evening.
BBC Scotland football pundit Willie Miller
"It's goals that are missing for St Johnstone. The two strikers played well enough. O'Halloran's pace was electric, [but] you were guaranteed goals with Steven MacLean and Stevie May."
BBC Scotland reporter Richard Wilson
"If this Rangers team were to be transplanted into the Premiership they'd be mid-table, top six. They would be some way short of being title contenders."
So, Rangers are the first team into the League Cup semi-finals. The three other quarter-finals take place tomorrow. Aberdeen are at home to Hamilton, Celtic welcome Partick Thistle and Hibs host Dundee United.
BBC Scotland football pundit Willie Miller
"I don't think it was a game of real quality. There was plenty of enthusiasm. The goal was a good header."
Joel McCroy Oblates: "#bbcscotfootball Rangers, so terrible tonight. They got no bearing and direction."
St Johnstone just cannot get hold of the ball. It's so frustrating for the men from Perth. Rangers are almost through.
Midfielder Lewis Macleod scores for Rangers in the closing minutes of the match.
Kenny Miller's first touch lets him down as he takes an incisive ball from Lee Wallace, allowing Alan Mannus to come off his line to repel the danger.
There will be six minutes of injury time.
James McFadden comes on for Lee Croft as Saints try to conjure a leveller. Rangers replace midfielder Fraser Aird with the more defensive Stevie Smith.
How can St Johnstone respond? There are two minutes of regular time to go plus a good chunk of injury time. Meanwhile, Ian Black cracks a shot at goal and Alan Mannus tips over.
Fraser Aird swings in a cross from the left, midway down the left flank, and Lewis Macleod rises between the Saints defenders to glance a header into the net. The Rangers fans in the crowd of 13,023 celebrate and begin to dream of a League Cup semi-final.
Michael O'Halloran looks lively as he makes towards the Rangers goal but an extra touch takes him wide and his shot is wide. Five minutes to go...and maybe 30 minutes more.
Rangers begin to crank up the pressure but the game could go either way. Lewis Macleod hits a shot wide of the target from the left of the box.
Lee McCulloch heads beyond Alan Mannus from an Ian Black free-kick but is ruled offside. He and John Daly broke beyond the red and black Saints line too soon.
St Johnstone midfielder Chris Millar, a player who loves to get involved in all areas of the pitch, ends a promising move by his team, as Lee Croft and Dave Mackay combine down the right and Millar picks up possession, drives at goal and skies a left-foot shot wide of the target.
Stuart Ritchie: "For all @FraserAird has contributed to this game he would have been better staying at home and watching Coronation Street #bbcscotfootball"
The Battle of Lees... St Johnstone midfielder Lee Croft crashes into the back of Rangers defender Lee Wallace out at the corner flag and from the resultant free-kick big John Daly, on for Kris Boyd, heads an effort off the post.
Kenny Miller and Kris Boyd combine well up front for Rangers with the former leaping to head down for his bearded team-mate. Boyd lashes a shot at goal but Saints defender Frazer Wright recovers his position well to make a crucial block with an outstretched leg.
David McCallion on Facebook: "Watching the game tonight and just wanted to comment on the lack of fans. I understand the fans are not happy with what's happening at Rangers but I fail to understand how they think staying away from the games is going to improve the situation in any way, shape of form."
Lee McCulloch head-flicks a free-kick that lands on the top of Alan Mannus's Saints net from 16 yards. At the other end, in front of the Broomloan Road stand, Brian Graham slices a shot wi-i-ide of Lee Robinson's goal.
Lee Robinson races outside his box and mis-times his attempt to clear the ball. Thankfully for him, rangers team-mate Darren McGregor is on hand to hoof it clear.
Goalkeeper Alan Mannus gathers Kris Boyd's lofted header across the goal as Kenny Miller races in on the Northern Irishman.
St Johnstone midfielder Murray Davidson is stretchered off after suffering a head knock.
Steven Anderson does just enough in his challenge on Rangers centre-forward Kris Boyd to put him off and his header drifts wide.
Steve Simonsen is being tended to and will be stretchered off. Lee Robinson comes off the bench for what I think is his first appearance for Rangers since May 2006. He has been at many clubs in between.
Well, that was a very sore one for Steve Simonsen. St Johnstone striker Brian Graham rises to head powerfully towards the Rangers goal and the big goalie dives to his left to make an excellent save but unfortunately he smacks his head against the post.
Immediately at the other end, Simon Lappin breaks clear down the left and races into the penalty box. His left-foot shot looks goalbound but Steve Simonsen gets down to tip it wide of the far post.
Kris Boyd side-foots a shot wide of the target from eight yards - it looks like Frazer Wright did enough to divert it wide. Lee McCulloch meets the corner at the near post but hits it wide.
St Johnstone get the second half going.
Rangers striker Kris Boyd fends off Steven Anderson - no mean feat - using a rugby-style hand-off at Ibrox.