Barcelona target left exposed after draw with Villarreal as supporters vented their fury at his ‘dream’ to leave Julián Alvarez entered a long, dark tunnel on his own. “We’re stronger together,” Giuliano Simeone said but that wasn’t the way it went. At the end of their first home game of the season, a 2-2 draw with Villarreal, all of Atlético Madrid’s players gathered by the centre circle, shook hands with their opponents and each other, then headed towards the south end of the Metropolitano. A…