Dunfermline boss Neil Lennon has warned Celtic that 'underdogs bite' as his side aims to cause a Scottish Cup shock in Saturday's final. The former Celtic captain and manager says some have pedalled a 'disrespectful' narrative in the build-up to this weekend's showpiece occasion at Hampden. The Championship side has beaten top-flight Hibernian, Aberdeen, and Falkirk on their way to the final, which Lennon believes has fuelled an 'inner belief'. 'It's not a day out for us,' the 54-year-old says. 'I've seen a lot of comments this week about Martin [O'Neill] picking up the trophy with Callum McGregor and if he'd have been here earlier in the season, he would have been winning a treble. 'I wouldn't dismiss us. We're the underdogs, but underdogs bite.' Dunfermline go into the final on the back of having their Premiership promotion hopes ended by a play-off semi-final defeat by Partick Thistle last week. Asked if he was annoyed by those who he feels have written his side off, Lennon added: 'Yes. It just adds fuel for me, so it's great. It's disrespectful which, again, I don't mind. 'We will come - I wouldn't say brimming full of confidence - but with an inner belief that we can achieve something here. We're under no illusions as to how difficult that's going to be.'