Big Surprise in Arsenal's 4-2-3-1 XI vs Southampton

Arsenal face an in form Southampton side in the FA Cup fourth round contest and manager Arsene Wenger has made nine changes in the starting XI that featured last weekend vs Burnley.
Theo Walcott has returned from his injury and starts on the right wing today. Hector Bellerin has also returned to start in the right back position. South American goalie David Ospina starts in place of Petr Cech.
As far as the central defense is concerned, Rob Holding has replaced Laurent Koscielny in the lineup and will partner German international Shkodran Mustafi.
The midfield battle is going to be very important and it seems that Wenger is taking Southampton lightly. Surprisingly, Alex Oxlade-Chamberlain will play in the central midfield with 19-year-old Maitland-Niles.
The likes of Reine-Adelaide and Lucas Perez will start with Walcott in the attack behind lone center forward Danny Welbeck.
Here is Arsenal’s confirmed lineup vs the Saints.