Merino (foot) successfully underwent surgery and has begun a lengthy recovery process that is expected to take several months, coach Mikel Arteta said in the press conference. "I think the doctors were really happy with the way the surgery went. Now it's the start of obviously a long process, we're talking about bone healing. So, we'll respect the timings, and I'm sure he's going to do everything he possibly can to speed up that recovery. The timeframes we're talking about are months - whether it's three, four or five, we don't know."