Liverpool midfielder Adam Lallana could miss the game with his former club, Saints, on the opening weekend of the season after injuring his knee.

The 26-year-old, who moved to Anfield from St Mary's earlier this month, sustained a knock to his lateral collateral ligament during a session at the Reds' Harvard University training base in Boston.

Although no timeframe has been placed on a return to fitness, such injuries can result in a spell of anywhere up to six weeks on the sidelines.

Saints travel to Liverpool on August 17.