Ferrer has left Spain for a 15-day session with Zverev in Monte Carlo, according to the paper, and would join the 23-year-old German player for the rescheduled clay season if the two decide to extend the partnership. Ferrer, who ranked as high as No. 3, won an ATP Masters 1000 title, and reached the French Open final during his career.
Zverev has been the subject of controversy recently for not following self-isolating guidelines upon his participation in the Adria Tour, where several players and their team members tested positive for coronavirus. Zverev, who had extended contact with the other players during the event but did not test positive, was then filmed at a private party in Monte Carlo in subsequent days.
The world No. 7 is also scheduled to play an exhibition event in Berlin next week, though organizers have warned he could be excluded if he does not follow their stricter protocols.
Zverev, who is coached by his father, Alexander Sr., has brought on former top players before, having been trained by Juan Carlos Ferrero and Ivan Lendl but experienced friction with both of them. He is among the most accomplished of the newer names on tour, having won three Masters 1000 titles and the 2018 ATP Finals.
Ferrer, who retired in May 2019, has not previously coached on tour.