He had three spells at Burnley, helped hometown club Swansea in to the top tier of English football and won 54 caps for his country.
The Blues lost to their Catalan opponents in their only final appearance in 2021.
The Manchester City striker suffered a muscular injury against Real Madrid which could keep him out of the Chelsea clash.
Alejandro Garnacho has apologised for liking a critical social media post while Jadon Sancho starred for Dortmund in this week’s Champions League