Team news: Six players back in full training

Here's the latest team news update from our medical team ahead of Saturday's Premier League clash at West Ham United:
 Hector Bellerin
Returned to full training.
(Left calf) 
 Laurent Koscielny
Returned to full training.
(Back spasm during warm-up at Blackpool)
 Dinos Mavropanos
Returned to full training.
(Groin)
 Shkodran Mustafi
Returned to full training.
(Right hamstring)
 Nacho Monreal
Returned to full training.
(Right hamstring)
  Mesut Ozil
Returned to full training.
(Left knee)
 Henrikh Mkhitaryan
Right foot. Expected to return to full training in February.
  Rob Holding
Left knee. Recovering after surgery.
 Danny Welbeck
Right ankle. Recovering after surgery.