Former Premier League referee Dermot Gallagher dropped a clear-cut verdict on the challenge made against Alejandro Garnacho in Manchester United’s 3-0 win against Southampton on Saturday. Manchester United returned to winning ways in the Premier League on the weekend and secured all three points at the St Mary’s to ease the pressure on Erik ten Hag. The Red Devils faced a tough first half against Southampton and the Saints came close to taking the lead after Diogo Dalot’s challenge resulted in a penalty. However, Andre Onana superbly denied Cameron Archer and the momentum swung in United’s fav…