 In 1987, AEK Athens' manager Nikos Alefantos asked the club's president Andreas Zafiropoulos not to renew Mavros' contract as he thought the player was too old to play for a team of that level.Zafiropoulos agreed and Mavros was released from the club and returned to his former club, Panionios.With Panionios he finished top scorer in Greek Superleague once (1990 with 22 goals) and, until his retirement in 1991, scored a total of 51 goals in 89 matches surpassing his former teammate at AEK Athens Mimis Papaioannou as the Greek Super League's all-time top goalscorer.