Local media have reported that the exciting Spanish international could become the Barcelona squad's highest-paid player if he meets certain performance-related clauses.
The veteran Polish forward, 36, reached 27 league goals for the season, although he finished behind Real Madrid's Kylian Mbappe on 31.
The win comes against a mighty Barcelona team considered on paper to be the best in the world.
The Brazilian, whose previous deal was set to expire in 2027, was vital as Barcelona won a domestic treble of La Liga, the Copa del Rey and the Spanish Super Cup.
Villarreal qualified for next season's Champions League with an entertaining 3-2 win at newly-crowned La Liga champions Barcelona on Sunday.
Barcelona's 28th Spanish league title caps a remarkable season defined by teenage sensation Lamine Yamal, who at 17 has emerged as world football's most electrifying talent.
A stunning Lamine Yamal strike helped crown Barcelona LaLiga champions with a 2-0 win at local rivals Espanyol on Thursday, with victory ensuring Real Madrid cannot catch them at the top of the table.
Defending champions Real Madrid may well lose the LaLiga title race to archrivals Barcelona tonight, but Los Blancos were happy to keep the fight alive for another day with a last-gasp 2-1 home win over Mallorca on Wednesday.
Real Madrid snatched a last-gasp 2-1 win over Real Mallorca on Wednesday to delay Barcelona's title celebrations.
Inter Milan saw off an exceptional Barcelona side to reach the Champions League final on Tuesday and, while manager Simone Inzaghi was understandably impressed by the opposition, he said that he would not change his players for anyone else.
Inter Milan substitute Davide Frattesi struck an extra-time winner to send his side into the Champions League final following a barnstorming 4-3 victory over Barcelona on Tuesday after Francesco Acerbi had rescued them from the brink of elimination with a stunning equaliser deep in added time.
Davide Frattesi fired Inter Milan into the Champions League final on Tuesday with an extra-time winner which gave the Italians a stunning 4-3 triumph over Barcelona, 7-6 on aggregate.
The first leg delivered one of the most entertaining matches of the competition, with Inter’s Marcus Thuram scoring the fastest goal in Champions League semifinal history after just 30 seconds.
Lamine Yamal, Barcelona’s teenage sensation, has earned admiration from fans, rivals, and legends alike after reaching his 100th appearance for the club. His performances have not only dazzled audiences but also revived memories of a young Lionel Messi, who took the world by storm two decades ago.
Barca have 79 points ahead of second-placed Real Madrid, who host Celta Vigo on Sunday. Hansi Flick's side next visit Inter Milan in the second leg of their Champions League semi-final on Tuesday after a 3-3 draw in midweek.
Barcelona coach Hansi Flick said goalkeeper Marc-Andre ter Stegen will start for Barcelona against Real Valladolid in La Liga on Saturday, his first appearance since September following a severe knee injury.
Barcelona defender Jules Kounde is set to miss the Champions League semi-final second leg clash with Inter Milan after he was diagnosed with a hamstring injury on Thursday.
For 22 minutes, Barcelona did not seem to believe they would reach the Champions League final, and then Lamine Yamal decided enough was enough.
Barcelona and Inter Milan shared a compelling 3-3 draw in a high-octane Champions League semi-final first leg clash on Wednesday, with teenage star Lamine Yamal shining bright.
