Jamie Carragher believes Luis Diaz has to step up his performances or risk Liverpool bolstering their attack in the summer.
Carragher also questioned the decision from Jurgen Klopp to start Cody Gakpo over Darwin Nunez for the Reds' 1-1 draw with Arsenal at Anfield on Saturday.
Liverpool came from behind against the Gunners but were forced to share the spoils after Mohamed Salah cancelled out Gabriel's opener.
It was the Reds' second successive Premier League draw after being held 0-0 by Manchester United at home one week earlier. After that match, there were questions asked of their attack.
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Gakpo and Salah then did score as Liverpool swept aside West Ham United 5-1 in the Carabao Cup. But speaking after the Arsenal clash, Anfield great Carragher pinpointed his concerns over Klopp's forward line - in particular Gakpo and Diaz.
"Looking at Liverpool's front three, there's something not quite right about it and for me, Nunez (Darwin Nunez) starts on the bench, for me he has to be one of the first names on the team sheet," said the 45-year-old on the Gary Neville Podcast.
"I saw him in midweek (against West Ham) and although he didn't score, he's creating, he can do something, Gakpo has been here for close to 12 months and he's had flashes but nowhere near enough.
"Diaz just looks like a shadow of himself, the knee injuries last season, he had family problems this season, but I feel Diaz needs a big second half of the season or Liverpool will be going in the market in the summer.
"With (Sadio) Mane and (Roberto) Firmino going they haven't really replaced
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