http://news.bbc.co.uk/sport2/hi/football/teams/c/celtic/7544311.stmBarcelona have agreed a deal "in principle" to sell midfielder Marc Crosas to Celtic for £712,000, according to the Catalan giants.Celtic appear to have seen off competition from Sevilla, Sporting Gijon and Sampdoria for the 20-year-old defensive midfielder's signature."Barcelona has the right to 25% of any possible future transfer," the club said on their official website.BBC Scotland has learned that some details have yet to be finalised.Barcelona said Crosas's transfer to the SPL club included add-ons, and revealed: "Also, Barcelona has an option of re-purchase at the end of the season 2009/10 for two million euros (£1.58m)."Nice...this is the natural heir apparent to Xavi...looks like Celtic are going to be ready for Champions League this year...PS: LOL @ Rangers