BARCELONA: Robert Lewandowski and Sergi Roberto's goals helped Barcelona beat Cadiz 2-0 and restore their eight-point lead at the top of La Liga on Sunday (Feb 18).Elsewhere Antoine Griezmann's superb strike helped Atletico Madrid earn a 1-0 win over Athletic Bilbao to tighten their grip on fourth place.Champions Real Madrid's win at Osasuna on Saturday pulled them closer to Xavi Hernandez's Barca, who had one eye on Thursday's Europa League play-off second leg against Manchester United at Old Trafford.However an inspired Ferran Torres helped Sergi Roberto to break the deadlock and Lewandowski added a second to leave Cadiz, 17th, two points above the relegation zone.The visitors had two Roger Marti goals disallowed and made Barcelona uncomfortable at times at Camp Nou but their victory rarely seemed in doubt.Xavi began with Sergi Roberto in midfield, replacing Pedri, who suffered a thigh injury in the Europa League 2-2 first leg draw with Manchester United last Thursday.The coach passionately defended the Catalan after the game, saying he was a player often used as a scapegoat."I've heard the most unjust criticism (aimed at him) in my life," Xavi told reporters."He's a homegrown player, with a spectacular attitude, always trying to help the team, he's unselfish."However it was Torres' arrival that made the key difference for Barcelona in the first half.The winger has struggled badly at times this season, but with Ousmane Dembele injured and Raphinha rested to face United, he took his chance with both hands.Torres was hyperactive, dribbling past defenders at pace and tying Cadiz's defence in knots.One such run down the right saw him cross for Lewandowski after 43 minutes and although the Polish striker's effort was saved,