The Catalan giants won comfortably at San Mames to round out their season, thanks to the Poland international's double and a Dani Olmo penalty.
Barcelona concluded their triumphant La Liga season with a thumping 3-0 win over Athletic Club at San Mames, thanks to a brace from Robert Lewandowski and a late Dani Olmo penalty.
After 13 minutes, and a disallowed Athletic Club goal for offside, Robert Lewandowski scored a superb goal, chipping Unai Simon when one-on-one after a superb through ball from Fermin Lopez, bringing up his 100th goal for the club.
In the 17th minute, Lewandowski had a second, ghosting in at the back post, after a wicked delivery from Raphinha, who turned in a performance befitting his status as a Ballon d'Or favourite.
Lewandowski could have had a hat-trick two minutes after the restart following a superb pass from Raphinha but his close-range effort skimmed the crossbar.
Athletic Club hit the bar themselves on 70 minutes, as Aitor Paredes met a corner with his head and was denied by the woodwork.
Going into injury time, Dani Olmo appeared to be fouled in the box and appealed for a penalty; a VAR review awarded the spot-kick, from which the midfielder converted to give the champions a 3-0 win.
GOAL rates Barcelona's players from San Mames…
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Inaki Pena (6/10):
Bilbao's shooting was wayward, hardly testing the goalkeeper. Bailed out by the crossbar in the second half but commanded his area well.
Eric Garcia (7/10):
Busy down his flank but made some very strong challenges up against Nico Williams, who always wanted to run at him.
Ronald Araujo (6/10):
Made more clearances than any Barca player as Athletic Club ratcheted up the pressure throughout the first half. Subbed for Christensen on the hour.
Pau Cubarsi (7/10):
Passed the ball so well and was so rarely beaten on the ground. He's exceptionally good.
Alejandro Balde (6/10):
Got forward whenever he could, as always, although he wasn't quite as effective as usual in the final third.
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Gavi (8/10):
Strong in midfield, making tackles, and taking immense care of the ball. Barcelona's best midfielder on the night.
Pedri (6/10):
Athletic pressed him well and forced a couple of wayward passes. It's notable only because of how brilliant he usually is at keeping the ball.
Fermin Lopez (7/10):
Fantastic assist for Lewandowski's opener. More than one key pass in a superbly creative performance.
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Lamine Yamal (7/10):
Always a threat. A couple of efforts, one of which trickled wide after some excellent high pressing.
Robert Lewandowski (8/10):
Scored two superb goals, the first a brilliant chip and the second a fine header after a clever run. Uncharacteristically poor finishing stopped him from scoring four.
Raphinha (9/10):
Brilliant delivery for Lewandowski's header and was denied another world-class assist by a surprisingly poor finish from the Poland international. A superb display and one that strengthens his Ballon d'Or case. Subbed for Olmo.
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AFPSubs & Manager
Dani Olmo (7/10):
On for Raphinha. Won and scored the late penalty to add some gloss to the scoreline.
Andreas Christensen (6/10):
Slotted into the backline and did well until full-time.
Gerard Martin (N/A):
On for Balde late.
Frenkie de Jong (N/A):
On for Pedri late.
Hansi Flick (8/10):
A 3-0 win, plenty of rotation, and a season ended in style. You can't really ask for any more than that.