Key to Arne Slot's early success as Liverpool manager has been his ability to improve players already at the club.
The Dutchman wasn't handed a war chest during his first transfer window on Merseyside but still made immediate improvements, with the likes of Ryan Gravenberch, Ibrahima Konate, Curtis Jones and Luis Diaz all notably developing on his watch.
However, not all have enjoyed their time under Slot. Liverpool's stalwart left-back Andy Robertson has not only failed to improve since Jurgen Klopp's departure, he's declined swiftly. The Scotsman, who is only 30, has struggled to adapt this season, making individual errors at an alarming rate and generally supplying sub-par performances.
With Kostas Tsimikas not pulling up trees as his deputy, it's possible that Liverpool explore the left-back market in the coming windows. Here are four they could target.
Alphonso Davies has been linked with a Bayern Munich exit / Daniel Kopatsch/GettyImages
3. Antonee Robinson (Fulham)
Antonee Robinson has been touted with an Anfield move / Robbie Jay Barratt - AMA/GettyImages
Rayan Ait-Nouri has been linked with the Reds previously / Gaspafotos/MB Media/GettyImages
1. Milos Kerkez (Bournemouth)
Milos Kerkez is making waves on the south coast / Malcolm Couzens/GettyImages