By Ewan Murray West Ham round off their pre-season campaign with a home friendly against Spanish outfit Celta Vigo on Saturday afternoon. The Irons are just a week away from kicking off their Premier League season against Aston Villa and will get another opportunity to sharpen their skills ahead of Julen Lopetegui’s first competitive game in charge. Pre-season has perhaps been a little concerning for Hammers fans, though. After a draw with Ferencvaros and narrow win over National League Dagenham & Redbridge, West Ham travelled to the United States where they lost meetings with Wolves and Cryst…