Liverpool need to make some signings with Chelsea "kicking at their heels" according to Emile Heskey, who has admitted to being a "little bit worried" about the lack of summer spending at Anfield.
Jurgen Klopp guided Liverpool to their first league title in three decades last season, while also delivering the UEFA Super Cup and FIFA Club World Cup.
The Reds finished 18 points clear at the top of the league after being crowned champions with a record-breaking seven games left to spare, but their biggest test is yet to come.
Editors' Picks
Only three teams have successfully defended the Premier League title in the modern era, and the likes of Manchester City, Chelsea and Manchester United are expected to mount strong challenges in 2020-21.