Liverpool right-back Conor Bradley took a major step in his rehabilitation from a long-term back injury as he joined first-team training on Wednesday.
Bradley has not been involved in any capacity since the 4-4 friendly draw with Greuther Furth at the start of pre-season.
The Northern Ireland suffered a stress fracture in his back, and subsequently missed the remainder of the warmup schedule plus the first 16 games of the campaign.
But after three months out, Bradley returned to light training in October, before joining his team-mates for a session on Wednesday afternoon.
However, the 20-year-old is unlikely to be involved against the Ligue 1 side on Thursday night, with Klopp and his staff cautious in his reintroduction.
“He is with the ball, he is doing all these things with [head of recovery and performance Andreas] Schlumberger and that looks promising.
“It will be great to have him back because we know that he can be a really attacking threat on our right side.”
Bradley was expected to serve as deputy to first-choice right-back Trent Alexander-Arnold this term, following a breakout loan spell at Bolton last season.
With Liverpool progressing to the quarter-finals of the League Cup and potentially qualifying for the knockout stages of the Europa League as soon as Thursday night, there could be opportunities for Bradley coming up.