The 23-year-old went for two days of work experience at Stoke where Begovic and fellow shot-stopper Thomas Sorensen were in the Potters' first team squad.
And Bentley learned a lot from the 48 hours he had up in Staffordshire and set him on the path where he and Begovic could be lining up against each other at Stamford Bridge.
“I trained with Asmir when I went up to Stoke six years ago for training for a couple of days,” he revealed.
“It was a work experience thing when I was 17. I went up there and trained with Asmir, Thomas Sorensen so it was a great experience for me. It was a great thing for me to take forward.”
Bentley learned from the way Begovic went about his work and adapted it, becoming one of the best keepers outside the Premier League.
The Brentford man added: “He was a top man then and I got on well with him and he's proven himself in the Premier League and is an excellent goalkeeper, while (Chelsea number one) Thibaut (Courtois) is one of the best in the world. It's up to us to beat them.
“There wasn't anything specific – it was more the way he was. He was very welcoming and he was very encouraging to me and supportive with the couple of days I was there.
“He probably won't remember me as I've changed in the last six years.”
Ironically four years ago, Bentley could have been part of a side to go up against against Chelsea but for Brentford beating a Southend side inspired by former Bees keeper Paul Smith.
And, now at Griffin Park, he has the chance to take on the Premier League leaders.
He said: “It's funny how things work. When you look back and what has happened since. I'm now here and we're facing them in the same competition.
“We're going there to give a good account of ourselves and win the game. We've got to go and stamp our foot on the game and try and get the win and get through to the next round as the most important thing.”
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