The Guinea global is a talented midfielder and Jurgen Klopp's side had to beat off competition from other elite clubs in order to sign him.
Keita is due to join Liverpool in the summer after a deal was agreed in advance.
He scored the opening goal in Saturday's 3-1 league win against Schlake at the Red Bull Arena with some home fans thinking it was the last timer they will see their star man.
"Naby Keïta will remain an #RBLeipzig player until 30th June 2018".
"They have shown renewed interest to bring him in during this transfer window".
"That is all we know". "A sale [in January] would have only been possible if we had secured an additional, exorbitantly high transfer fee".
Mahrez embarked on a unusual sequence of events on transfer deadline day in the summer when his national side allowed him to leave to seek a move away from the King Power Stadium.