Arsenal have completed the signing of 20-year-old Greek defender Konstantinos Mavropanos from PAS Giannina.
The London club officially announced the transfer on Thursday, after manager Arsene Wenger confirmed on Wednesday that the deal was happening and that the centre-back would be sent out on loan.
Arsenal provided no details of the contract or where Mavropanos will be sent on loan. But a source told ESPN FC on Wednesday that the deal is worth around £2 million, and that Mavropanos is expected to spend the rest of the season with German club Werder Bremen.
Mavropanos has impressed in his first full Greek league season, scoring three goals in 16 appearances. But Wenger said after the 2-2 draw with Chelsea on Wednesday that "he's not ready to play for us" just yet.
Mavropanos is Arsenal's first January signing, although Wenger said earlier this week that he is also looking to sign "exceptional" players that can give his side an immediate boost.