Robert Lewandowski scored a hat-trick to help Barcelona beat Celta Vigo 4-2 on Sunday in La Liga and cut Real Madrid’s lead down to three points in the standings.The veteran Polish striker’s treble helped Hansi Flick’s side capitalise on Los Blancos’ 0-0 draw earlier at Rayo Vallecano.Recommended Stories list of 4 itemsend of listTeenager Lamine Yamal also scored for Barca in another gripping game produced by the champions’ attacking approach, and Marcus Rashford produced two more assists.Frenkie de Jong was sent off late on for Barca for two yellow cards but by then the champions had secured their victory to move second.Lewandowski has had a stop-start beginning of the season because of injury and Flick said his hat-trick would boost his confidence.“After the injury I can see a different Robert Lewandowski, he’s positive, he came back very early,” Flick told reporters.“For him, for his confidence, it’s great to score three goals today.”Lewandowski said the game was “one of the craziest” of the season, but was happy with the result.“Vigo is always difficult for us but now we have less points (between us) and Real Madrid,” Lewandowski told Movistar.Flick insisted Barcelona would not change their style despite some recent struggles, including a 3-3 draw with Club Brugge in the Champions League on Wednesday, and it led to a wild first half.The champions nosed ahead through a Lewandowski penalty on 10 minutes after a handba …