Former Liverpool defender Jamie Carragher has taken aim at Adam Lallana's fitness after the England international played 70 minutes of the 3-1 Premier League win over 10-man Leicester City.
Lallana scored the Reds' equaliser after 26 minutes before goals from Steven Gerrard and Jordan Henderson completed back-to-back wins for Brendan Rodgers' side.
The 26-year-old midfielder was replaced by Joe Allen after the midway point of the second half as Liverpool looked to close out the victory that moved them into the top half.
But upon the substitution being made, Carragher observed on Twitter: "Has Lallana ever played 90 mins? Same with Lfc & Southampton."
The ex-Southampton player has made 10 starts in all competitions this season, completing the full 90 minutes on just four occasions, most recently coming against Real Madrid in the 1-0 Champions League defeat last month.
After securing his move from the south coast club in the summer, Lallana missed the first month of the season with a knee injury and was unable to make his first Liverpool appearance until the home loss to Aston Villa in September.
Despite sparking Liverpool's first-half comeback at the King Power Stadium, Lallana received treatment for a knee problem prior the break before being replaced by Allen as Rodgers looked to cement the lead given to them by captain Steven Gerrard.
Rodgers did not comment on the potential problem nor the premature substitution in his post-match press conference to calm fears over any potential long-term injury.
And former Anfield hero Phil Thompson feels Lallana's fitness should be tested in a Liverpool team still finding its way this season.
"This guy seems to play exceptionally well, sometimes man of the match, then he doesn't play the next [match]," Thompson told Sky Sports News.
"You see his goal, technically it was brilliant. He is one of the few players in the Liverpool side who can get in between the lines and turn quickly.
"I can't understand why he doesn't play more often. He brings something to the party. He is progressive with his passing and his movement. He should be one of the main starters every match."