THIS season's Scottish League Cup has produced more than its fair of shocks and it's unrealistic to expect all four favourites to progress to the semi-finals.
Rangers, Hearts and Aberdeen are among the sides who have crashed out to lower-league opposition which makes Celtic, who face Hibs on Wednesday, no bigger than 4-6 to lift the trophy.
That means three SFL sides feature in tonight's quarter-final clashes but all have been drawn away to SPL outfits.
However, the one I feel can provide another giantkilling act is Falkirk who head for struggling Dundee United.
The Arabs are without a win since they knocked out Airdrie in the previous round while Falkirk's only defeat came at Morton a couple of days after their stunning 3-2 defeat of Rangers.
Falkirk are huge at 9-2 with boylesports with United no bigger than 7-10 at Stan James and the draw 10-3 with Chandler.
Farid El Alagui netted a double against Rangers and has 13 for the season. He is 7-1 at McBookie.com to hit the opener.
For United you could do worse than consider on-loan Fulham striker Lauri Dalle Valla who came as close as anyone to scoring against St Johnstone at the weekend. He is 5-1 at McBookie.com.
Ayr have knocked out Inverness and Hearts at Somerset and at home are able to match almost anyone.
On the road it's a different story and they haven't won away from home in Division One this season.
So it doesn't augur well for a trip to a St Mirren side who are playing some decent stuff this season and scoring plenty of goals.
Shirt sponsors bodog will refund all losing bets on the game if Ayr win – but there' as much chance of that as Mario Balotelli getting cheap home insurance.
Tonight's other tie sees Killie entertain East Fife who have accounted for Dunfermline and Aberdeen. It looks like being third time unlucky against a side who will attempt to play them off the park.
Falkirk to qualify
(9-4, Paddy Power)
Killie v East Fife both to score