The Liverpool squad face a gruelling day of physical tests and assessments as pre-season training gets underway at Melwood.

Captain Jordan Henderson, Sadio Mane, Roberto Firmino, James Milner, Daniel Sturridge, Nathaniel Clyne, Lucas Leiva and Joel Matip were among those who reported back for duty around 8am this morning.

The Reds' sports science staff will gather information on all the players to establish the shape they're in after the summer break.

The players stepped on to the scales with their weight and height recorded before having breakfast together and then it was into the gym where a movement screen examines the players’ stretching capabilities with three stations recording data.

Next up, Jurgen Klopp's squad will be split into two groups to do three laps of the 400-metre track outside. Blood samples are then taken to test their heart rate and blood lactate, which is an indicator of endurance levels.

After lunch, it's into the testing gym where the players will use a force plate to measure what they put into jumps and the height they can reach. This provides an indication on the strength of their muscles and groins.

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New signing Mohamed Salah, along with the likes of Adam Lallana, Philippe Coutinho, Emre Can, Gini Wijnaldum, Simon Mignolet and Dejan Lovren, return later in pre-season as a result of their international commitments at the end of last season.

Players at Melwood today: Karius, Grabara, Gomez, Matip, Milner, Moreno, Randall, Alexander-Arnold, Henderson, Lucas, Stewart, Mane, Firmino, Chirivella, Kent, Flanagan, Sakho, Markovic, Clyne, Sturridge, Bogdan, Ings.