Liverpool have agreed to sell 22-year-old Argentine winger Sebastian Leto to Panathinaikos, the British club's website said.
Leto, who was on loan to Greek rival Olympiakos last season after trouble with his work permit prevented him playing in England, is the Athens club's fourth summer recruit.
Djibril Cisse and Kostas Katsouranis are joining from Olympique Marseille and Benfica, while Malian defender Cedric Kante was signed on a free transfer after his contract with Nice expired.