Arsenal have been excellent at set-pieces this season, and a 5-0 victory over Crystal Palace saw them score twice from corners. Gabriel Magalhaes nodded in an excellent opener, and thought he had doubled the lead from another corner in the first half, but his goal was later confirmed as an own goal by goalkeeper Dean Henderson. Arsenal now rank as the best team in the Premier League when it comes to set pieces, and specialist coach Nicolas Jover has been gaining attention for his work on the training ground in helping set the team up for them. One clever aspect of Arsenal’s set-piece routines …