Stoke City are continuing their recruitment drive despite not having a first-team manager.
The Potters are yet to replace Mark Hughes, who was sacked following an embarrassing FA Cup loss to Coventry last Saturday.
Full-backs Moussa Niakate and Moritz Bauer made the switch to Staffordshire this week.
The 27-year-old has started every game for the Turkish giants this season bar one, in which he was suspended.
A Senegal international, Ndiaye played a pivotal role in helping his country qualify for the 2018 World Cup.