Reds head coach Jurgen Klopp confirmed after his side's 1-0 victory that Ryan Gravenberch had damaged ankle ligaments following a challenge from Chelsea's Moises Caicedo in the first half of the contest.
Endo, meanwhile, was spotted leaving the stadium on crutches, sparking fears that the defensive midfielder could also be set for a spell on the sidelines.
The 31-year-old was able to play the full 120 minutes of the final, but according to journalist Andy Hunter, he suffered a knock to his ankle in a challenge with Caicedo.
Klopp did not address a possible injury for Endo after the match, but the midfielder is now a major doubt for Wednesday's fifth-round contest with Southampton in the FA Cup.
The Liverpool manager admitted after the clash with Chelsea that he was unsure how he would put a team on the field due to the volume of injuries at the club.
«We don't have a team right now for Wednesday. The guys who came on can maybe play again, the rest will get treatment on Monday,» he told Sky Sports News.
«I love this country to bits, but the schedule is not made for winning a lot. We will see the price we have to pay, but we fight for everything then we see what comes next. Somehow against Southampton there will be a team in Liverpool shirts.»
Gravenberch and Endo have joined an injury list at Liverpool which also includes Joel Matip, Diogo Jota, Trent Alexander-Arnold, Alisson Becker, Curtis Jones, Darwin Nunez, Mohamed Salah, Dominik Szoboszlai, Thiago Alcantara and Stefan Bajcetic.
The club's fitness problems allowed the likes of Bobby Clark, Jayden Danns and James
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