Arsenal are preparing an offer for Borussia Dortmund defender Sokratis Papastathopoulos.

Gazzetta dello Sport says Arsene Wenger is certain to be in the market for at least one centre-half at the end of the season, and the Greek International fits the bill.

But the Gunners are likely to face some stiff competition to land the 29-year-old, with Manchester United, Juventus and Chelsea all believed to be interested.

Papastathopoulos, rated at about £25million, joined Dortmund in 2013 when now-Liverpool boss Jurgen Klopp was in charge.

Since then he has become one of the Bundesliga club's most reliable players and has had interest from a number of clubs.

He has made 192 appearances for Dortmund.