Arsenal boss Unai Emery has claimed that he will sign a central defender in the January transfer window.
The Spaniard has also revealed that he has some backup plans in case he fails to bring in a fresh face.
Reports suggest that Arsenal are considering Chelsea veteran Gary Cahill and Manchester United out of favour Eric Bailly.
Emery is currently facing the problem of injuries Rob Holding ruled out for the remainder of the season with a cruciate ligament injury.
Furthermore, Konstantinos Mavrapanos has been out all season while captain Laurent Koscielny is only starting his recovering after six months in the sidelines.
Arsenal chief Raul Sanllehi told BBC Sport earlier this year: “I’m not a strong believer of the winter window, normally it’s used for emergency cases when things are not going the way you planned in the summer window.”
But Emery admits the time may have come for the Gunners to be busy on the market in the new year and admitted of his winter window plans.
“If we can take one player to help us at centre-back, I think it’s a good option.”
“A transfer is not easy and the possibility with Calum is maybe one option, but I don’t know if we can do that.”
“Koscielny is coming back and for the team, it’s very important he is coming back.”
“Then we are going to wait and see how Mavropanos is improving with his injuries because he is also a centre back who can help us.”
“Nacho Monreal and Lichtsteiner can play in this position. But I prefer to use if we can, a specific centre-back.”
Meanwhile, Emery will be without both Sokratis Papastathopoulos and Shkodran Mustafi when the Gunners will travel to Southampton this Sunday due to bookings.