Lionel Messi scored a hat trick as Barcelona won a record ninth Supercup by beating Sevilla 4-0 in the second leg for a 5-3 aggregate Saturday. After losing the first leg 3-1 in Seville, league champion Barcelona dominated from the start in its Camp Nou Stadium. In the 14th minute, Pedro Rodriguez delivered a low cross that rebounded in off defender Abdoulay Konko. In the 25th, Messi ran on to Xavi Hernandez's long through pass and put a first-time shot past goalkeeper Andres Palop. The Argentina striker scored his second and put his side ahead on aggregate in the 44th, shooting high into the net after being put through by Daniel Alves. Messi ran on to Andres Iniesta's pass to complete his hat trick in the 90th. Barcelona fielded an under-strength side in the first leg, with none of its eight players who helped Spain to World Cup victory available. However, on Saturday coach Pep Guardiola fielded a more familiar-looking side. With doubts over the future of Zlatan Ibrahimovic, and new signing David Villa starting on the bench, Bojan Krkic accompanied Messi and Pedro in attack. Victor Valdes returned in goal and playmaker Hernandez was in central midfield, alongside Sergio Busquets and Seydou Keita. Copa del Rey winner Sevilla, which went into the game following a 1-0 defeat to Braga in the Champions League, struggled in midfield and barely threatened in the first half as Spanish league champion Barcelona controlled possession. Barcelona's ninth Supercup trophy means it has one more than archrival Real Madrid. Inter bags Supercup Inter Milan picked up right where it left off from last season, winning another trophy with a 3-1 victory over AS Roma in the Italian Super Cup Saturday. Samuel Eto'o scored twice in the second half at the San Siro to break a 1-1 deadlock in Inter's first official match since Jose Mourinho departed for Real Madrid. Left back John Arne Riise put Roma ahead in the 21st minute, collecting a pass from Francesco Totti and beating Inter goalkeeper Julio Cesar from the edge of the area. Goran Pandev equalized for Inter in the 41st, profiting from an ill-advised pass by Roma forward Mirko Vucinic into his own goal box. Roma defender Juan couldn't clear and Pandev slid the ball in through goalkeeper Bogdan Lobont's legs. Eto'o gave Inter the lead in the 70th following a cross from Diego Milito, then sealed the victory 10 minutes later after Rodrigo Taddei gave away the ball. “The thing that pleased me most was that the squad fought until the end even though it's not in top form yet,” new Inter manager Rafa Benitez said after his debut.