He said: "Whoever succeeds [Sorrell] needs to be a good human being – not wicked and nasty, generous and not greedy, sharing and not selfish or egotistical."
Lévy’s comments come after WPP’s chairman Roberto Quarta acknowledged that the world’s largest marketing services company has begun both an internal and external search for Sorrell’s successor.
In WPP’s 2015 Annual Report, Quarta wrote: "At some point we all leave our jobs. The question is when. Whether, in Sir Martin’s case, that happens tomorrow, in one, two, three, four or five years, or even over a longer period, we have already begun to identify internal and external candidates who should be considered."
Lévy is himself due to retire in May 2017.
Read Campaign's in-depth analysis for Levy’s full comments on Sorrell’s successor and the views of other senior players including a prominent WPP shareholder. Or play our game to find out who should take Sorrell's crown.