One of the midfielder linked with a summer move to Premier League giants Manchester United has always been a regular source of goals. In fact, the £60 million-rated star has reached double figures in four of the last five seasons. But while the number of goals has remained relatively consistent – averaging 14 across those four campaigns – the manner in which he finds the back of the net has changed quite a bit. The Manchester United-linked Teun Koopmeiners, during his time as the captain of Eredivisie outfit AZ Alkmaar, scored most of his goals from set-piece situations. Penalties, more often …