The 27-year-old has spent the last four seasons at Zenit St. Petersburg, who forked out an eye-watering €40million fee back in summer 2012.
The combative midfielder has helped Zenit claim a Premier League title and a Russian Cup, whilst amassing 156 appearances across all competitions.
But the Belgium international has been tipped to leave this summer, with contract due to expire at the end of next season and a number of Premier League clubs chasing his signature.
Last week, The Daily Mail revealed that Chelsea and Everton were in the running to sign the 71-cap enforcer, with the latter club lining him up as a long-term replacement for Gareth Barry.
But Mirror Football now report that Liverpool are targeting Witsel as well, after missing out on Sevilla midfielder Grzegorz Krychowiak.
The Reds were in the frame to sign the Poland international but he’s snubbed their interest in favour of following manager Unai Emery to PSG.