This is the fourth occasion that Harrison has been named among the first-team substitutes, but the first instance under current Blues head coach Enzo Maresca.

Harrison will be looking to help Chelsea through to the fourth round of the Carabao Cup and here's what you need to know about the young midfielder...

How old is Ollie Harrison?

Harrison celebrated his 18th birthday last month. He was born on 7 August 2007 in Gateshead and grew up in the North East.

What position does Ollie Harrison play?

Harrison is a ball-playing central midfielder who is willing to take the ball under pressure and build attacks with his range of passing.

He has also showcased his leadership skills during his time in our Academy, captaining the Blues' Under-17s and Under-18s.

How long has Ollie Harrison been at Chelsea?

Harrison agreed a scholarship with the Blues and joined the club in August 2023 from Newcastle United.

During his first campaign at Stamford Bridge, he was named as a first-team substitute away to Manchester City in the Premier League and against Leeds United and Leicester City in the FA Cup.

What is Ollie Harrison's record for our Academy teams this season?

Harrison has made the step up to Under-21s football this season, playing 90 minutes in each of our opening four Premier League 2 fixtures and in our EFL Trophy match against Shrewsbury Town.

He also featured for the Blues' Under-19s side in the opening fixture of the UEFA Youth League against Bayern Munich. Harrison started and completed the game in Bavaria, which we won 3-2.

What country does Ollie Harrison represent?

The midfielder has been a regular for England at youth level, featuring for the Under-16s, Under-17s and Under-18s.

What squad number does Ollie Harrison wear?

The midfielder will wear the No58 for the Blues.