Mamadou Sakho's Liverpool future appears to be in some doubt after he was sent home from the club's pre-season tour of America.

The 26-year-old France international has not played in any of Liverpool’s friendlies because he is nursing an Achilles problem that will prevent him starting the new Premier League campaign.

He was included in the squad that travelled to Palo Alto in California last week but manager Jurgen Klopp decided to send the centre-back home after question marks were raised about his attitude around the camp.

Liverpool have not commented on the reasons for Sakho’s departure.