Unai Emery has come out and claimed that a player Mikel Arteta sold at Arsenal is the best in his position in the world right now. The Spaniard spent 18 months as Arsenal’s manager after Arsene Wenger left the club. His time there wasn’t memorable at all, but he did have some excellent players at his disposal. Arteta replaced Emery after he was sacked, and the current Arsenal boss has made plenty of changes to his side over the years. Most players who worked under Emery at the time have been moved on, and one of them has achieved some incredible things since leaving the Gunners. Emery has now …