The Jamaican midfielder who made a handful of appearances for Bolton in the Premiership has scored four goals from his last five outings for the Latics.
The most recent of those goals was in front of the watching Chris in Oldham's 1-1 draw against Doncaster on Saturday.
Chris said: "On the day Jermaine Johnson, an attacking midfielder who has been at Bolton for the last couple of years, was probably their biggest threat. He played just off the front and scored their goal.
"Oldham play a 4-4-2 and they certainly have good enough players that when it comes to the big contest are very capable of raising their game.
"It's fair to say this will be their biggest game so far and they will be relishing it.
"They drew 1-1 at Doncaster, it wasn't the best of days, very blustery but they had very good spells in the game."
Oldham are currently 17th in League One but boast a fine record at Boundary Park with three wins in four games.
"They are a good side and the first thing that has to come into everyone's mind is that it's a cup competition," added Chris.
"The foreign players we have are well aware of the reasons why there can be upsets because they are used to cup competitions themselves. In England cup competitions mean even more to supporters and clubs and there is every opportunity that one of the small clubs will beat one of the so-called bigger clubs. We have to make sure it's not us."
Chris Hughton picks out Jermaine Johnson as the man to watch in Oldham's ranks tonight.