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Possible additions to the back line include:
Avraam Papadopoulos, Jose Holebas (Olympiacos), Nikos Spyropoulos, Loukas Vyntra (Panathinaikos), Giannis Skondras (Atromitos), Vangelis Moras (Cesena), Stelios Malezas (PAOK), Georgios Tzavellas (Monaco) and Giannis Zaradoukas (Giannina)
Each has defender has played with the national team with the exception of Skondras, who has been anchoring the under 21 team that is attempting to qualify for Israel next year.
Skondras is the captain of his club and a main stay for the under-21 team. With them still in contention for a possible spot in the tournament final, Santos will probably pass him over.
Papadopoulos and Holebas have been very reliable for an Olympiacos team on the verge of another double in Greece. Papadopoulos is a center-back which gives him an added advantage with Maniatis move to the midfield. Holebas after being naturalized has already earned two caps for Greece. An excellent free kick taker makes him an easy choice.
Spyroupoulos has quietly had a very good year for Panathinaikos in a year in turmoil for the club. Spyropoulos is more offensive minded defender that is very adapt at crossing the ball.
Vyntra looks to be on the down side of his career. While still getting time at Panathinaikos , Vyntra has been on the bench for most games.
Zaradoukas until his transfer to Giannina was stuck on the bench at Olympiacos. The move didn't exactly make him a starter he did appear in 5 games for them.
Tzavellas is a solid defender who now is playing for Monaco after a year in Germany for Eintracht Frankfurt. Overall, Georgios has appeared for his club for twenty games.
Moras — after a short stint in the English Premier League with Swansea — moved to AC Cesena in Italy and has been a regular for the club since his transfer. He is no stranger to Serie A, where he played for Bologna for five years. A reliable veteran center-back is looking for a call up since June of 2010.
Melazas is the anchor of PAOK back line. Having guided PAOK to the knockout stages of Europa League, Melazas has appeared in all but two games for PAOK on the season. He is another center-back that will let you know he on the field