When the third-round draw was made live on TV, Tyler wasn’t even watching it.
He later found out they had been given an away tie against Everton – and could hardly believe it when his dad called to give him the news.
The youngster said: “I was sat there in a hotel getting ready for a game and I just got a call from dad saying ‘have you seen it?’ I didn’t even know the draw was that day so I just said ‘seen what?’
“He said ‘I’m playing against you in the FA Cup’. I was like ‘no, you’re not.'”
But how did he feel when the truth finally hit home?
“I can’t wait to play him and try and beat him. We’re very competitive. I’m definitely faster.”
As you might expect, the subject came up once or twice around the Young dinner table over the Christmas period.
“We’re now closer to the game, so he’s lucky to still be in the house, to be honest,” said Ashley.
“I don’t talk highly of him a lot because it’s the way my dad was with me. I keep him grounded. Even now, when I’m playing games, my dad will tell me what I’ve done wrong, what I’ve done right.
“Having an 18-year-old son, he’s fantastic when he wants to be but annoying at times. This week he comes up as an enemy, so hopefully he’ll have a good game but it’ll be us that’ll be going through.”
Tyler’s only first-team appearance for Posh so far came as a 63rd-minute substitute in a 2-0 EFL Trophy victory over Stevenage in October.
However, Ferguson told BBC Radio Cambridgeshire: “When we signed him, the first couple of months he was outstanding. He came on in a first-team game and did very well.
“He had a little bit of a dip, as young players do, but he’s got talent. He’ll be on the bench, I can’t guarantee he’ll get on, I think the way the game goes will determine that.
“He couldn’t have a better role model than his dad, still playing at 40ish. To do that, you have to be at it every day. To be continuing to play at that level, you have to have done something very special throughout your career.”
The game is subject to a 13:00 GMT safety inspection because of the wintry conditions in the Merseyside area.
But if it does go ahead, it will only be the second meeting between the two clubs – and Young Sr will not be doing his son any favours as Everton look to avoid an upset.
“He’s 18 years old, he’s an adult, he’s going to have to look after himself on the pitch. If there’s a tackle there, whether it’s me or someone else, it’s just what happens.”
