The London club have initially targeted Swansea's Ashley Williams but the deal has gone cold and the club have cited Papadopoulos as an alternative.
Papadopoulos currently plays for Schalke in Germany, he joined the club from Olympiacos. The Greek defender has been a regular for the German side making 92 appearances, scoring seven goals.
The 21-year-old is a regular for his national side making over 16 appearances and in the process scoring four goals.
Papadopoulos was an integral part of the Greece squad who were knocked out of Euro 2012 in the quarter-finals by Germany.
Papadopoulos is a tall defender at 6ft and is a huge presence in defence. The Greek is quick, agile and an aggressive defender.
His main attributes are power and strength, with the ability to win many aerial battles and make important tackles. He also has the ability to play as a defensive midfielder as he has done previously for club and country.
Papadopoulos has had injury problems in the past and is carrying a knee injury at the present moment. This could be a decisive factor in the money Schalke receive for the player.
Arsenal face a fight to the land the Greek defender with strong interest from other Premier League clubs. Manchester City, Manchester United, Chelsea and Liverpool have all been tracking the player with defensive problems of their own.
If Arsenal do sign Papadopoulos they will be getting a young, pacey defender who is a leader in defence.
Papadopoulos can be a success at Arsenal with his international experience and Champions League experience at Schalke both standing him in good stead.
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