The clash will be extra special for Okonkwo, having come right through Arsenal's youth system, where he would face-off against Chelsea regularly.
Okonkwo said, "It's amazing.
“We always have the opportunity to create history here. Every season we play here, and every season I've had at Wrexham, there's always been something we've been able to achieve.
“That’s something that we’ve already done this season, and we're looking for more. We're going into the game as underdogs, which sometimes can work in your favour.
“It just gives you extra motivation and makes you want to fight more and give it everything you have. All we can do against Chelsea is give everything we have and see how the result goes.”
He added, “I've played against Chelsea in the academy for years. I know how good of a club they are. I think everyone knows how good of a club they are.
“It's going to be a special moment for me to play such a big team in such an important competition.
“It's come full circle, playing against them in the academy, dropping down to League Two, coming back up and then having the opportunity to play against them in such a big game in the FA Cup.”