This comes after reports in Germany have speculated that the Guinean international will play his final game for the Bundesliga team today, in their home clash against Schalke, before allegedly completing his move to Merseyside tomorrow.
Rumours have been flying around this transfer window about whether Liverpool will bring forward the signing of the midfielder, after the departure of key player Philippe Coutinho to Barcelona last Monday.
The 'Reds' agreed to sign the 22-year-old for £66.4m in August on the condition that Keita could play one final season for the German side, who had qualified for the Champions League for the first time in their history.
They have since been knocked out but remain in a critical position in the Bundesliga for qualification for the competition again, with Ralph Hasenhuttl's team in fifth two points off second-placed Schalke.