What does history tell us about Dons' upset hopes?published at 12:46 21 May
Liam McLeod
BBC Sport Scotland Commentator

Scottish Cup final 1990: Dons spot on against Celtic
Much will be said and written about one of the strangest league seasons in Aberdeen's history as they eventually dropped to fifth place in the final Premiership standings.
Having been bottom six last term it is an improvement on the face of it, but many will feel a lingering sense of disappointment given the strong position they occupied in November.
As focus now turns to Saturday's Scottish Cup final, what happened in the league will be forgotten if they can upset the odds at Hampden Park.
The Dons are massive long shots. Bookmakers make Celtic 1/7 odds-on favourites to complete a domestic treble. In other words, they give Aberdeen next to no chance of ending a 35-year wait for a trophy they won five times in eight years from 1982 to their last success in 1990.
Indeed, you won't find anyone outside Aberdeen giving them a prayer and that is something manager Jimmy Thelin will surely tap into this week with his players. After all, there is always a chance.
Given Brendan Rodgers' side have run in 10 goals in the past two meetings and hit Thelin's men for six at the national stadium in November's League Cup semi-final, it is little surprise Aberdeen are such underdogs.
The fact they go into the final on the back of four successive defeats means they are hardly in great shape to face the best team in the country for the silverware.
So, how do the Dons cause one of the biggest Scottish Cup final upsets in the competition's 152-year history?
You have to go back to 1994 for inspiration when Dundee United defeated Walter Smith's dominant Rangers side. The Ibrox club were huge favourites and like Celtic this season, were on a treble, only to have it scuppered by Craig Brewster's goal.
Yes, Hearts beat Rangers fours years later but Smith's team was ageing by then, had missed out on 10 in a row and Jim Jefferies' men had competed well at the top of the league that season.
Before '94, you are probably going back to Eddie Turnbull's Aberdeen getting one over Jock Stein's Celtic in 1970 for a bona fide shock result in a Scottish Cup final. Stein's side featured eight Lisbon Lions, but the Dons won 3-1.
The last time Aberdeen lifted the trophy in 1990 after an energy-sapping penalty shootout, they were a better team than Celtic and had won the League Cup earlier that season so it wasn't a surprising outcome.
The gap between the two has flipped dramatically since then while Rodgers hasn't lost a game at Hampden and has only lost one of the 42 domestic cup ties he has presided over across his two spells at Parkhead.
Whatever way you slice it up, if the Scottish Cup has red and white ribbons wrapped round it on Saturday evening, it will have been as the result of one of the biggest shocks in the history of the showpiece.
