The Jags travel to Parkhead on Saturday in the fifth round of the cup with the odds stacked heavily against them.
The Hoops are comfortable favourites to retain the trophy but go into the game on the back of a 1-0 defeat to Kilmarnock on Saturday – just their second domestic defeat of the season – and Doolan thinks his side could spring a surprise if the players take that belief into the game.
When asked if Thistle could be potential winners of the cup this year, the veteran forward said: “It’s down to mentality. People will turn around and maybe laugh because the gulf is so big, but Kilmarnock showed that on your day anything can happen.
“I personally think we can go and win every game, and we have to think that.
“I’m sure Celtic think that way and it’s important to have that mentality that you are good enough to win.
“We are under no illusions how difficult it is going to be but on the day, Kilmarnock showed last week that anything can happen and it just takes one goal to win the game, and thankfully for Kilmarnock they got it so if we can do something similar, we would be delighted.”
Doolan is just one goal short of a significant landmark in Thistle’s history on 99 league goals.
But the team’s league form this year has been of more concern to the striker, who admits the cup is a welcome distraction from the relegation battle.
“We are looking forward to it because it is a break from the league,” he said.
“The league games have been thick and fast since the break and it’s a nice distraction, but the carrot is there to try and get through to the next round and what better place to do it than at Parkhead?”
On the Scottish Cup and its significance, he added: “Players love the Scottish Cup, and I think it’s great that it hasn’t lost its meaning to players.
“Players enjoy what the Scottish Cup means to supporters. We are all aware that fans want cup runs, clubs want cup runs and we’ve seen over the years that its not always Celtic and Rangers that have won them; other teams have popped up along the way and won these cups.
“We all take a lot of confidence from that and hopefully will use that.”
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