GLASGOW, Nov 8 (Reuters) - Rangers suffered a humiliating 2-0 home defeat to second division leaders St Johnstone in their Scottish League Cup quarter-final clash on Wednesday.
Their exit follows that of old rivals Celtic who lost on penalties to Falkirk 24 hours earlier.
The Rangers debacle piled more pressure on under-fire manager Paul Le Guen who apologised to fans.
He told reporters: 'This was one of the worst results (of my career). I am very disappointed and I apologise to our supporters because our performance was so poor.
'After we lost our organisation ...they deserved the victory.'
Saints took the lead with a spectacular overhead kick from striker Steve Milne in 52 minutes from seven metres out.
Milne added a stunning second 16 minutes later when he ran on to drill a low shot beyond keeper Allan McGregor.
Elsewhere, Hibernian beat Edinburgh rivals Hearts 1-0 with a first half goal from Rob Jones to book their semi-final berth.
Holders Celtic crashed out 5-4 on penalties to Falkirk on Tuesday following a 1-1 draw after extra time while Kilmarnock dismissed Motherwell 3-2.
The semi-final draw will be made on Thursday but Le Guen must now look to the Rangers' league position where they already lie 15 points behind Celtic in a distant third place.
Le Guen said: 'I will try to carry on. I am the manager and it is up to me to cope with the situation. I have lost many games before, but this was one of the worst.'