The former Reds striker believes Havertz would lift the entire squad.
He told GentingBet: "Kai Havertz is a young, dynamic player. So, adding that to the current Liverpool side is always good. You always need options. When you have a young, hungry lad come in, it puts pressure on the more senior players to go out there and perform. This is what you need at the top clubs. You need three players per position that are putting pressure on all the others to perform.
"If you haven't got that, that is when people get complacent. When a player knows they have someone behind them ready to take their position, it keeps everyone on their toes."