Lionel Messi has told Barcelona he wants to leave the soccer club immediately, a source confirmed on Tuesday. The announcement has put Europe's top clubs on alert for a potential transfer of the six-time world player of the year. Subscribe: http://smarturl.it/reuterssubscribe Reuters brings you the latest business, finance and breaking news video from around the globe. Our reputation for accuracy and impartiality is unparalleled. Get the latest news on: http://reuters.com/ Follow Reuters on Facebook: https://www.facebook.com/Reuters Follow Reuters on Twitter: https://twitter.com/Reuters Follow Reuters on Instagram: https://www.instagram.com/reuters/?hl=en