Celtic defender Saidy Janko knows all about cup upsets.
The 19-year-old was eagerly anticipating his dream debut for Manchester United before it turned into a nightmare.
Away at MK Dons, a much-changed United side were hoping to recover from a shaky start under Louis van Gaal but instead they suffered an ignominious 4-0 defeat to the League One outfit.
Janko played 45 minutes before he was substituted.
However 12 months on, and as Celtic prepare to face Raith in the League Cup, who themselves are no strangers to Cup shocks after Morton beat them in 2013, Janko believes they can ill-afford to take their opponents lightly.
“I don’t know much about Raith Rovers to be honest but what I’ve learned is that you cannot underestimate anyone,” he said.
“You have to give 100 per cent if it’s Europa League or the Championship. You play at your best that’s it.
“You always get upsets in cup ties with lower league clubs and the United game for me was a reminder of that.
“It was a bit unfortunate. The manager was not happy with the formation. I was the one who had to go off but at least I got a few minutes.
“I was one of the younger guys and I was trying to give my best but perhaps it was difficult for the players to play with the younger players.
“Giggsy said I did well and it was a bit unfortunate. They always helped me and talked to me so that was good.
“For me, it was a good experience because not many 18-year-olds get to play in the first team at Manchester United so I’m very honoured but it could have gone better.”