(Reuters) – Manchester United manager Erik ten Hag’s first game at home will be a pre-season friendly against LaLiga side Rayo Vallecano at the end of July, the Premier League club announced on Monday. The match at Old Trafford on July 31 will conclude United’s preparations for the new leauge season, which starts on Aug. 6. Ten Hag’s side are due to visit Thailand and Australia as part of their pre-season tour before playing Atletico Madrid in Oslo and then Rayo, who finished 12th in LaLiga last term. “Pre-season is all about preparation and this is a great opportunity for those squad members …