Liverpool midfielder Kevin Stewart suffers ankle injury in training

Liverpool will be without Kevin Stewart and Adam Lallana for Thursday's Europa League trip to Augsburg -- and there are fears that Stewart could face a longer spell out after he was injured in training.

Stewart, 22, picked up an ankle knock when blocking a shot at Melwood on Monday and is awaiting the results of a scan on possible ligament damage.

The defensive midfielder has impressed since being given his Liverpool debut against Exeter City in the FA Cup third round in January, going on to play a prominent role in the replay and the two fourth-round meetings with West Ham.

He performed well on his Premier League debut at Aston Villa on Sunday but will not travel to Germany with the squad on Wednesday, Reds manager Jurgen Klopp has confirmed.

"We lost Kevin Stewart in training," Klopp told Liverpool's official website. "He blocked a shot and his ankle was not stable. It was a bit bruised, so we have sent him for a scan. We think it's the ligament.

"He trained outstandingly, and then this happened. That's not too good."

Lallana will miss the Europa League round-of-32 first leg with a calf problem, but Lucas Leiva has recovered from a hamstring issue and is available to offset the loss of Stewart in central midfield.

"Lucas is back fit but not Adam -- he has no chance for Thursday's game," Klopp said.

Defender Dejan Lovren was being assessed with a view to a possible return to action against the Bundesliga side after being withdrawn only 11 minutes into Liverpool's 2-2 draw with Sunderland on Feb. 6.