Robert Lewandowski produced a moment of brilliance to bag his brace for Barcelona against Valladolid.The Polish striker opened the scoring at the Camp Nou as Barcelona raced into a 1-0 lead after just 24 minutes, but it was his second half strike that was the pick of the bunch.Xavi's side were firing on all fours and despite their off-pitch struggles, Lewandowski's incredible, backheel finish to secure a brace proved just how fluid and in sync they are on it right now.Pedri had given Barça a 2-0 lead minutes before half-time and while they were firmly in the driving seat on Sunday evening, another goal was definitely needed to truly put the game to bed.And of course, it was Lewandowski who came up with the goods for the second time on the night.Waiting around the penalty box as Ousmane Dembele cut inside and weaved his way through traffic, he latched onto the Frenchman's cute ball in behind and left spectators scratching their heads as they figured out how on earth he popped the ball into the goal.It turns out Lewandowski - who had been ushered away from the net - produced an insatiable backheel finish to make it 3-0 after 64 minutes, securing his brace and sending fans into frenzy.Check it out below.

WATCH: Lewandowski's backheel finish

Absolutely obscene. Stop that, Lewa.

Barcelona ran riot at Camp Nou as Sergi Roberto made it 4-0 before the full-time whistle, maintaining their unbeaten start to the La Liga season in convincing fashion.

Lewandowski arrived from Bayern Munich in summer, with plenty of eyebrows raised over how Barcelona would fund the deal, and even if he could maintain his rampant firing rate after moving to La Blaugrana.

The season is long and Lewandowski still has it all to prove throughout a tireless campaign, but the early signs suggest he will absolutely fly.

As well as the Polish forward, Barcelona have bolstered their squad with the likes of Franck Kessie, Andreas Christensen, Raphinha and Jules Kounde - the latter of whom finally made his debut in the victory over Valladolid after much anticipation.

BARCELONA, SPAIN - AUGUST 28: Robert Lewandowski of Barcelona celebrates after scoring their side's third goal during the LaLiga Santander match between FC Barcelona and Real Valladolid CF at Camp Nou on August 28, 2022 in Barcelona, Spain. (Photo by David Ramos/Getty Images)

Kounde had been linked with a move to the Premier League throughout the summer and in previous years, but Barcelona swooped in and got the deal over the line to pip the competition.

Fans had to wait to see him pull on the famous red and blue stripes for the first time, but with registration issues now dealt with, he took to the starting XI and kept a clean sheet while Lewandowski delivered the goods in outrageous fashion at the other end of the field.