Former Liverpool striker Emile Heskey is worried about the team's lack of transfer moves.
The Reds have not made any major signings this summer, only adding depth at left back.
They are looking to sign Thiago Alcantara from Bayern Munich, but will likely hinge on Gini Wijnaldum going to Barcelona.
"When you watch other teams buying players in the manner they are buying players, you're always a little bit worried," the former Reds striker told talkSPORT.
"When you're looking at Liverpool fans and Klopp, they have so much trust in him and understand where he's going with it, but then again, I do think back-up wise Liverpool need two or three players.
"When you lose the likes of Jordan Henderson, Virgil van Dijk, Mohamed Salah, Sadio Mane, Roberto Firmino - Firmino makes a lot of it tick and when you lose that how do you replace him? I don't think they've got that as of yet.
"It's difficult to judge the Community Shield game, especially with the pre-season the lads have had. The season has ended and they haven't really had a break, they've had to come straight back.
"You look at Liverpool and what Klopp can get out his players and you always put them up there alongside Man City, so it'll be interesting to see who hits the ground running first - but obviously you have Chelsea kicking at their heels now, they've bought some outstanding players."
