Barcelona thumped Real Sociedad 6-1 at the San Sebastian in La Liga as Ronald Koeman's side produced their best display of the season.A brace each from Lionel Messi and Sergino Dest, coupled with goals from Antoine Griezmann and Ousmane Dembele, knocked La Real out of the park.Ander Barrenetxea pulled one back for the hosts in the 77th minute through a fantastic volley but it proved to be nothing more than a consolation.Following a slow start, Griezmann and Dest gave the Catalans a 2-0 cushion by the break and then ran riot in the second-half.They hit all the right notes and tore Sociedad asunder with a frightening attacking display never seen from them until now in this campaign.⚠️ | QUICK STATBarcelona have now scored six goals against Real Sociedad for the first time since 14 October 2000 (0:6).What a night for the Catalan side!#RealSociedadBarca pic.twitter.com/glRgMcfUy6— SofaScore (@SofaScoreINT) March 21, 2021The resounding victory takes them above Real Madrid in the table and they remain just four points behind runaway leaders Atletico Madrid.Barcelona player ratings:Marc-Andre ter Stegen - 7/10He was having a comfortable evening and was on his way to another clean sheet. But a golazo from Barrenetxea put a small taint on his pristine copybook.Oscar Mingueza - 6/10A solid shift from the Spaniard, who also made his presence felt in attacking areas by throwing his weight around in Sociedad's half. However, when they upped the ante after the break, Mingueza was a peripheral figure.Frenkie de Jong - 6/10He played his role as a centre-back to a T once again and made a few good blocks in the first-half to keep La Real at bay.Clement Lenglet - 6/10Lenglet was rock solid in defense, winning all his aerial duels. He completed 92% of his passes and two out of three tackles too.Sergino Dest - 8/10The young American bagged his first pair of La Liga goals in an amazing offensive display, with both strikes being top-notch.3 - @FCBarcelona's Sergiño Dest 🇺🇸 is the third American player to score in @LaLigaEN history, after Jozy Altidore in 2008 (1) and Yunus Musah in 2020 (1), and the first to score a brace. Jazz. pic.twitter.com/aMcsw1xEIt— OptaJose (@OptaJose) March 21, 2021Sergio Busquets - 7/10Busquets played his role of orchestrator to perfection. He capped it off with a beautiful assist for Messi too.Pedri - 6/10Compared to how rampant everyone around him was, Pedri was a little subdued, but nevertheless attempted one shot of his own too. He ought to do more though.Jordi Alba - 7.5/10It was a vintage performance from the Barcelona veteran; a well-spring of excellent crosses and one assist to show for his efforts too.🔎 | FOCUSJordi Alba impressed on the left flank for Barcelona:⏱️ 90' played👌 85 touches🅰️ 1 assist🎯 2 big chances created (most)🔑 4 key passes (most)👟 55/66 acc. passes💨 1/2 succ. dribbles🧲 2 interceptions❌ 2 tackles📈 8.0 SofaScore rating#RealSociedadBarca pic.twitter.com/XYwYbil441— SofaScore (@SofaScoreINT) March 21, 2021Lionel Messi - 10/10The Barcelona ace weaved his magic once again and Sociedad were left absolutely spellbound. He was involved in both first-half goals, even assisting Dest with a sublime through-ball. He then found the net himself twice after the break. Lionel Messi was at his unplayable best.HE'S DONE IT 👏Leo Messi has overtaken Xavi to become Barcelona's record appearance holder with 768 🐐 pic.twitter.com/L6gYY0S1Bj— ESPN FC (@ESPNFC) March 21, 2021Antoine Griezmann - 7/10Back at his old stomping ground and on the scoresheet against his old colleagues - how poetic! Griezmann latched on to a loose ball from Dembele's initial effort and opened the scoring. Co-incidentally, it was his birthday too! Not a bad way to celebrate.Happy 30th birthday to Barcelona's Antoine Griezmann! 🔵🔴 pic.twitter.com/aDJYSgYHZf— Goal (@goal) March 21, 2021Ousmane Dembele - 7/10A constant source of threat for La Real with his great link-up play and incisive passes. Dembele topped his performance with a sublime goal.28 - Ousmane Dembélé 🇫🇷 has scored 28 goals for @FCBarcelona in all competitions, 14 with his left foot and 14 with his right. Ambidextrous. pic.twitter.com/R1VCp632HY— OptaJose (@OptaJose) March 21, 2021SubstitutesRonald Araujo - 6/10Araujo replaced Busquets and helped take control of the midfield.Francisco Trincao - 7/10Trincao played a neat one-two with Alba to set up Messi's second goal.Ilaix Moriba - 7/10He picked up another assist by sending a simple offload to Dembele.Riqui Puig - N/AHe came on for Griezmann during the final few minutes to see out the game.Martin Braithwaite - N/AHe too came on too late and thereby saw very little of the ball.