Barcelona returned to winning ways in emphatic fashion, destroying Deportivo Alaves 5-0 courtesy of goals from Ansu Fati, Lionel Messi (2), Luis Suarez and Nelson Semedo.In what was an open-ended affair right from the outset, the Catalan giants pumped everything they had into the game. They were denied by the woodwork thrice, before three goals inside the first-half put Alaves to sword.Nelson Semedo, who came on as a 50th minute substitute for Clement Lenglet, turned comfortable to comprehensive with a composed finish for the fourth.It could have been much more for the fluent Barcelona, had it not been for opposition goalkeeper Roberto and the post. Nevertheless, they capped off their La Liga season on a positive note and will head into their Champions League round-of-16 with their heads held high.In the process, Barcelona also won their seventh successive league game against Alaves.Barca sign off the La Liga season with a 5-0 win 🖐 pic.twitter.com/DYiFtHQZRt— B/R Football (@brfootball) July 19, 2020👏👏👏👏👏 pic.twitter.com/OYMANjB4f6— FC Barcelona (@FCBarcelona) July 19, 2020This has probably been Messi’s worst season for years. He has scored 25. And given 21 (?22) assists.— Sid Lowe (@sidlowe) July 19, 2020The visitors gave it a real rattle from the beginning of the game but saw themselves repudiated by the frame of goal. Riqui Puig, who ran the show from midfield, was the first to smash the post, followed by Arturo Vidal and Messi.Barcelona continued to lay siege, until Messi's accurate cross from the right flank found Fati, who slammed the ball into the bottom corner with ease. It was Messi's 21st assist in the Spanish top-flight - the most in a season by any player in the history of the league.🌟 Bojan – 10 GOALS🌟 Ansu Fati – 7 GOALS💙👶❤️ @FCBarcelona's top scoring players under the age of 17 in #LaLigaHistory! #AlavesBarça pic.twitter.com/fAsdzXrpwz— LaLiga English (@LaLigaEN) July 19, 2020Lionel Messi makes it 21 assists for the season, overtaking Xavi to set a new La Liga record 🙌 pic.twitter.com/lNjtWQ32SB— ESPN FC (@ESPNFC) July 19, 2020Ansu Fati scored 8 goals for Barcelona:- 5 of them were go-ahead goals- 1 was an equalizer- 4 were the first goal of the game pic.twitter.com/hL9LOBxENk— adil (@Barca19stats) July 19, 2020Amid all of their problems, Barcelona have two extraordinary young players in Riqui Puig and Ansu Fati who offer a beacon of hope for the future and could shine for the next decade at the Catalan club.#AlavesBarça— Ben Hayward (@bghayward) July 19, 2020Puig, who was literally everywhere on the pitch, set up Messi for the second after his side broke through with pace. The little magician waited his finish to leave Roberto helpless and score his 24th goal of the season.Lionel Messi moves 3️⃣ goals clear of Karim Benzema in the race for La Liga's top scorer 👑 pic.twitter.com/PuoCcS3Y30— Goal (@goal) July 19, 2020Ricardinho Puig is a baller. Finally a proper La Masia midfield talent after Thiago. We’ve had to suffer with the likes of Sergi Roberto and Rafinha lol— Jimmy (@FCBJimmy_) July 19, 202024' Assist34' GoalJust another afternoon for Messi. pic.twitter.com/Vmhrzg8gQV— B/R Football (@brfootball) July 19, 2020LIONEL MESSI SO FAR:1 GOAL1 ASSIST1 PRE-ASSISTGOAT FROM OUTER SPACE 👽 pic.twitter.com/uwWAICK33H— Barcelona Worldwide (@BarcaWorldwide) July 19, 20207 - Barcelona's Lionel Messi has scored in seven of his nine LaLiga appearances against Alavés (nine goals on aggregate). Regular. pic.twitter.com/lsnh5zFxmo— OptaJose (@OptaJose) July 19, 2020After already holding the record of most goals in one La Liga season (50), Messi now also holds a new record of most assists in one La Liga season (21), while having also scored 24 goals in that same season. That’s insane. pic.twitter.com/5oeaXHdJgH— 𝐀𝐅𝐂 𝐀𝐉𝐀𝐗 💎 (@TheEuropeanLad) July 19, 2020Messi could win his seventh Pichichi award today. He's two goals ahead of Madrid's Benzema. If Messi wins the award, he will be the first in history to reach the magical number of seven Pichichis. [md] pic.twitter.com/RqsNCIEA1A— barcacentre (@barcacentre) July 19, 2020On the cusp of half-time, Jordi Alba found space just as he always does down the left flank, feeding Suarez with a short volley.The former Liverpool striker finally took his chance after having missed a one-versus-one earlier. It was a beautiful passage of play, with Messi again at the heart of it.GOAL BARÇA! @LuisSuarez9 heads in to make it 3-0! Assisted by @JordiAlba! pic.twitter.com/fpMx6PUnCZ— FC Barcelona (@FCBarcelona) July 19, 2020Luis Suarez, the only player that can be the best & worst number 9 at the same time pic.twitter.com/d1nb0mznfL— ETReacts (@ETReacts) July 19, 2020Me every time Suarez misses a simple 1v1. pic.twitter.com/pa7n7oiHr1— Karan Veer (@animated_karan) July 19, 2020Messi and @JordiAlba's connection... 🔥⚡️🔥#AlavesBarça pic.twitter.com/Up14jiR2Xa— LaLiga English (@LaLigaEN) July 19, 2020Barcelona muscled up at the back whenever Alaves turned over possession. They were in complete control of the game, more so with Nelson Semedo's fourth goal that summed up a stellar afternoon for the outgoing champions.It was also a second assist of the game for young Riqui Puig, who played Semedo in with a lovely touch off the outside of his boot.GOAL! Nelson Semedo scores Barcelona's fourth.Where was this Barcelona the rest of the season?#AlavesBarca pic.twitter.com/5btdoTZe11— Goal (@goal) July 19, 2020When you get your first AND second assist in #LaLigaSantander... 😍💎 @RiquiPuig 💎#AlavesBarça pic.twitter.com/YnzBQZF6sG— LaLiga English (@LaLigaEN) July 19, 2020No Vidal for the Napoli game which means Puig and Frenkie both startpic.twitter.com/DY5AUmwx7o— Qam (@ftblblaugranaV2) July 19, 202018 - 18 different players have scored for @FCBarcelona in LaLiga 2019/20, more than in any other LaLiga season since, at least, 1998/99. Variety. pic.twitter.com/5Xy02CBePC— OptaJose (@OptaJose) July 19, 2020Where's the lie?? Riqui Puig pic.twitter.com/t3sXTFPfn0— TURP (@Emmy_Jhayy) July 19, 2020Messi then put the icing on the cake with a world-class finish for the fifth, latching on to a cross from Alba. Thereafter, it was just humiliation as far as the hosts were concerned.📊 Messi has now contributed to 1,000 goals in his career using Opta stats only.🥅 703 goals🅰️ 298 assists #Messi1000 pic.twitter.com/V5hBf0Qaqo— Barcelona Worldwide (@BarcaWorldwide) July 19, 2020INCREDIBLE! Messi has now been involved in 𝟭𝟬𝟬𝟬 𝗴𝗼𝗮𝗹𝘀 in his professional career!⚽️ 703 goals🎁 297 assists#beINLiga 📺 HD3 pic.twitter.com/aTZetakaNq— beIN SPORTS (@beINSPORTS_EN) July 19, 2020PICHICHI SEALED!!#AlavesBarca pic.twitter.com/1x7DjZ2asR— Messi Worldwide (@Messi_Worldwide) July 19, 2020The five-star display from Barcelona illustrated the appetite and quality present within the squad. It was certainly some respite for Messi, who was extremely vocal in his criticism of the team following the 2-1 loss against Osasuna.Maybe next year Karim... pic.twitter.com/aq0EZh6e9v— total Barça (@totalBarca) July 19, 2020Messi slaps the ball into the bottom right to go four goals ahead in the Pichichi race.— Barça Universal (@BarcaUniversal) July 19, 2020The season ends on a high! Obviously it doesn’t mean a great deal in the grand scheme of things. But it at least gives us some positivity ahead of the Champions League and some MUCH needed confidence.— TalkFCB (@FCBNewsRoom) July 19, 2020Also check out: All-time Messi vs Ronaldo stats