A stunning second-half strike by 18-year-old Manuel Locatelli gave AC Milan a 1-0 win over Juventus after the Serie A titleholder had a goal controversially disallowed Saturday. Juventus thought it had gone ahead in the first half from Miralem Pjanic's free kick but the goal was ruled out for offside after a two-minute consultation between match officials. It was Milan's first win over Juventus for nearly four years and ended a run of nine successive defeats against the Turin side. Earlier, an unlucky own goal by Armando Izzo handed Sampdoria a 2-1 win over neighbor and bitter rival Genoa in a pulsating derby. Juventus stayed top with 21 points from nine games but Milan closed the gap to two points. Liverpool beats Westbrom A fluent Liverpool moved second in the Premier League with a 2-1 win over West Bromwich Albion at Anfield Saturday but will rue missing the prize of top spot a larger margin of victory would have secured. Victory by at least two goals would have put Juergen Klopp's side ahead of Arsenal and when Sadio Mane and Philippe Coutinho scored in the first half it looked good for the rampant Reds. Foster made superb saves from Dejan Lovren's header and another Firmino effort to keep West Brom in touch and the visitors gained an unlikely lifeline in the 81st minute when Gareth McAuley volleyed home from close range. Liverpool has 20 points from nine matches but Arsenal, which drew 0-0 at home to Middlesbrough, has a marginally better goal difference. Bayern downs Gladbach Arturo Vidal and Douglas Costa struck as Bayern Munich disposed of Borussia Moenchengladbach 2-0 Saturday to claim its first win in three Bundesliga matches and power three points clear at the top. Ancelotti's team has 20 points, three ahead of Hertha Berlin. Borussia Dortmund slipped to sixth position, six points off the pace, after needing a late equalizer from Christian Pulisic to salvage a 3-3 draw at Ingolstadt 04. Iniesta injured Andres Iniesta's serious knee injury overshadowed another stellar performance by Lionel Messi Saturday, when the Barcelona forward scored a second goal in stoppage time to earn a 3-2 win at Valencia. The hotly contested game was marred both by Enzo Perez's tackle that forced Iniesta off on a stretcher and a fan throwing a water bottle at Barcelona's players while they celebrated Messi's winner. The bottle appeared to strike Neymar's head and also impact other Barcelona players when it was tossed into their tight huddle. The defending champions rose to the top of the Spanish league. Barcelona is one point ahead of Atletico Madrid and Real Madrid. The victory, however, came at a high price: An injury that will sideline Barcelona's captain and key playmaker for at least six weeks. Iniesta clutched his right knee and called out for help from the team doctors when he was cut down by Perez in the 12th minute. Iniesta's knee appeared to buckle when he was hit by Perez's aggressive tackle. He was clearly in pain and held a hand over his face when he was put on the stretcher and carried off.