The champions' victory denies leaders Real Madrid the chance to take the crown by simply beating Cadiz next Saturday. Los Blancos are 11 points clear of Barcelona with five matches remaining.
Lewandowski set up goals for Joao Felix and Fermin Lopez either side of striking himself to pull Barcelona second, eight points behind leaders Real Madrid.
Barcelona came flying out of the blocks with goals from Fermin Lopez and Joao Cancelo but after Amir Rrahmani pulled one back, the Catalans started to sweat.
Robert Lewandowski's brace snatched champions Barcelona a 2-1 win over lowly Celta Vigo to leave them third in La Liga, trailing leaders Real Madrid by seven points.
Bayern Munich striker Harry Kane said Robert Lewandowski's league goals record was "still a bit too far away" despite again scoring a brace in a 4-2 win over Heidenheim on Saturday.
Barcelona striker Robert Lewandowski wants Lionel Messi back in the club this summer as the Argentine superstar’s contract with PSG is set to expire in June.
Barcelona face Madrid at the Santiago Bernabeu on Thursday in the first leg of the cup tie, already without injured duo Pedri and Ousmane Dembele
Raphinha and Robert Lewandowski's strikes helped Barcelona move eight points clear at the top of La Liga with a 2-1 win at Real Betis on Wednesday.
Fernando Santos, who was the Portuguese national team's manager until last month, was on Tuesday named as Poland's new coach.
Poland skipper Robert Lewandowski failed to break his World Cup duck when he saw a second-half penalty saved in a goalless but entertaining draw with Mexico in their opening Group C game at Stadium 974 on Tuesday.
Robert Lewandowski said on Friday that Poland's World Cup squad had been left in shock earlier this week after the missile strike in his homeland that left two people dead.
Robert Lewandowski's lethal finish sent Barcelona provisionally top of La Liga with a tight 1-0 win at Real Mallorca on Saturday.
Robert Lewandowski will wear both the Polish and Ukrainian captain's armbands at the World Cup in Qatar.
Relentless striker Robert Lewandowski pounced twice as Barcelona hammered 10-man Elche 3-0 to move a point clear at the top of La Liga on Saturday.
Bayern Munich scored twice in four minutes against the run of play through Lucas Hernandez and Leroy Sane to beat Barcelona 2-0 in their Champions League Group C match on Tuesday.
Robert Lewandowski scored a hat-trick in his first Champions League game for Barcelona to power the Catalans to an emphatic 5-1 home win over Viktoria Plzen on Wednesday.
Robert Lewandowski struck a hat-trick in his first Champions League game for Barcelona to power the Catalans to an emphatic 5-1 home win over Viktoria Plzen on Wednesday.
Robert Lewandowski scored his fifth goal in four LaLiga games for Barcelona and helped his team breeze past Sevilla with a 3-0 win on Saturday, with Raphinha and Eric Garcia both adding a goal each for the visitors.
Robert Lewandowski continued his strong start with Barcelona by scoring twice for the second game in a row as Jules Kounde made his debut in a 4-0 win over Real Valladolid in La Liga on Sunday.