Lionel Messi scored a penalty in his first game since trying to leave Barcelona as Ronald Koeman began his tenure as coach by overseeing a 4-0 La Liga demolition of Villarreal on Sunday. Messi converted from the spot and it was the Argentinian's cross that then forced Pau Torres into an own-goal, after an early double from the 17-year-old Ansu Fati had already put Barca in charge. ta/td