Ryan Woods has experience of facing Chelsea before when Shrewsbury were unfortunate not to take the Blues to extra time in their League Cup meeting in 2014.
The Brentford midfielder played 90 minutes as the Shrews left Jose Mourinho worried, especially after Andy Mangan cancelled out Didier Drogba's opener.
However, Jermaine Grandison's own goal nine minutes from time saw the Shropshire side bow out of the competition.
Woods will take heart from that display but also from Bradford, who stunned the Blues in that season's FA Cup clash.
“We take heart from Bradford. We were unfortunate to lose against them with Shrewsbury. If we can show them what we're capable of we've got a chance,” he said.
“It was a great experience playing against them. You want to test yourself against that calibre of player. Hopefully we can ruin the party for Chelsea and get a win.
“Jermaine Grandison scored an own goal in the 81st minute and it was gutting. We're going to come up against a good calibre of player and we'll give them a good game.”
Woods is likely to come up against Cesc Fabregas and he knows he will face a big test in trying to keep the Spaniard quiet.
“There's a number of players. They are all world class, otherwise they wouldn't be at Chelsea,” Woods added.
“I've watched Cesc. He's a very good player and he's been at those clubs (Arsenal, Barcelona and Chelsea) for a reason. I'll be looking forward to playing against him."
Keep up to date with the latest news in west London via the free getwestlondon app. You can even set it to receive push notifications for all the breaking news in your area.