Arsenal have spent a week taking in a warm-weather training camp in Dubai, with Mikel Arteta putting his players through their paces during the winter break. The Gunners return to competitive action on Saturday 20 January, when they host Crystal Palace at the Emirates Stadium in the Premier League. Arsenal’s players finished off their warm-weather training campaign in Dubai on Tuesday with a session that was shared by the Gunners media team two days later. Highlights from the session, as per Arsenal’s official YouTube channel, included an impressive volley by Gabriel Martinelli and a superb sa…