The England international is facing an uncertain future at the club as speculation over a big move away continues to gather pace.
The clash with Fiorentina could prove to be Rice's last game in a West Ham shirt if a summer move materialises.
With fans running out of opportunities to convince him to stay, the travelling supporters took their opportunity pre-match in Prague as they sang 'ten more years, Declan Rice' to the tune of the popular hymn, 'Give Me Joy In My Heart'.
talkSPORT understands that Arsenal are frontrunners to secure his signature, but Bayern Munich and Manchester United are also keen on him.
West Ham value the player at more than £100million.
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With such interest from some of the biggest teams in the game, Rice will have some difficult decisions to make this summer.
The 24-year-old has just one year remaining on his West Ham contract and with no extension likely, it means that he could be ending his association with the club.
As well as being a hugely popular player, Rice has been a top performer having made 244 appearances for the club prior to the Europa Conference League final.