Follow Sports Brief on Twitter for more trending and breaking news!

Barcelona fans are still celebrating Robert Lewandowski’s signing, but it has come with unexpected problems.

The Blaugrana captured the Polish striker from Bayern Munich for €50 million.

The marquee signing has dominated headlines and Barcelona were hoping to capitalise on the craze by profiting from the player’s popularity.

The club were hoping to recoup at least €20 million of that money spent on the transfer through the sale of the Polish striker’s official shirt, BarcaUniversal reported.

Exciting feature: Check out news exactly for YOU ➡️ find "Recommended for you" block and enjoy!

Excitement in Spain as Barcelona officially confirms signing of Robert Lewandowski from Bayern Munich

The demand for the player’s shirt has skyrocketed since Barca announced he would be joining the team but now the club can’t meet the demand.

The official Barcelona store can’t sell any more of the player’s shirts because they’ve run out of the letter W, Marca reported.

A fan recently went to the store to enquire why he couldn’t purchase a Lewandowski shirt and was told that because Lewandowski had two W’s in it, the store had run out of the letter.

The fan has since posted the video of the hilarious interaction on social media.

Barcelona has officially confirmed the signing of Robert Lewandowski from Bundesliga champions Bayern Munich after both clubs agreed to a deal for the 33-year-old forward.

Lewandowski joins the Catalan giants after penning a four-year contract with the Blaugrana after they paid a transfer fee of €45m plus €5m in variables.

Real Madrid president congratulates Barcelona on signing Robert Lewandowski from Bayern Munich

Barcelona has inserted a release clause of €500m in the contract of the Polish forward who has since joined the rest of his new teammates in the USA for their preseason tour.

Real Madrid and Barcelona may have a bitter rivalry but they know when to be the bigger team as well.

With Barcelona strengthening during the current transfer window, Los Blancos have no option but to acknowledge that their rivals could be a serious threat this season.

Barca have signed Raphinha, Andreas Christensen and Franck Kessie as well as re-signed Ousmane Dembele. It’s their latest signing that has got everyone talking though; Robert Lewandowski.