( CNN ) -- European champions Barcelona have agreed to sell forward Bojan Krkic to Italian club Roma for $ 17.3 million . Barcelona have an option to buy back the 20-year-old for $ 18.7 million at the end of the 2012-13 season , but Luis Enrique 's Roma can override the clause if they pay the Spanish champions a further $ 40 million . Bojan 's exit follows Thursday 's announcement that the Catalan side had captured Chile winger Alexis Sanchez from Udinese . The one-cap Spain international made his Barca debut in 2007 , and scored seven times last season despite being a fringe member of Josep Guardiola 's team . Barca land Chile star Sanchez . `` I want to be happy about football again . I am 20 years old and I want to continue demonstrating what I could n't here , '' he told reporters on Friday after confirming the end of his 12-year stay at the Nou Camp . `` Especially this last year there has been a lack of confidence in me . I did n't get much continuity , and that hurts , but I am also aware of things and consider myself privileged to have been part of such a magnificent team . These were four great years . I take away the positive aspects . '' Roma finished sixth in Serie A last season under interim coach Vincenzo Montella , the club 's former striker who replaced Claudio Ranieri as boss in February . Enrique , 41 , was appointed at the Stadio Olimpico last month after a three-year spell as coach of Barca 's B team . The former Spain international spent eight years as a player at the Nou Camp between 1996-2004 . Diego Capel has followed his national under-21 teammate Bojan in leaving Spain , with the Sevilla winger joining Portuguese side Sporting Lisbon for $ 5 million on a five-year contract . The 23-year-old became the 12th player to sign for new coach Domingos Paciencia , having helped Spain win the European U21 Championship in May . Capel made his league debut for the Andalusian club as a 16-year-old in October 2004 , and won the last of his two senior Spain caps nearly three years ago . Domingos guided Braga to the Europa League final last season , losing to Porto , and was subsequently appointed to replace Sporting 's caretaker manager Jose Couceiro -- who joined Russia 's Lokomotiv Moscow . Turkish club Galatasaray announced the signing of Brazil midfielder Felipe Melo on a season-long loan from Italian side Juventus on Friday . The 28-year-old joins Sweden striker Johan Elmander and Uruguay goalkeeper Fernando Muslera in joining the Istanbul team , now coached by former Turkey boss Fatih Terim after finishing only eighth in the domestic league last season . Galatasaray paid a loan fee of $ 2.15 million , and must deliver another $ 18.5 million to secure Melo on a permanent basis at the end of next season . Scotland striker Kenny Miller is poised to make a quick return to Britain after passing a medical with English second division team Cardiff on Friday . His former club Rangers had tried to re-sign him from Bursaspor , but the Turkish club rejected the Scottish champions ' offer . The 31-year-old scored five goals in 15 games following his move to Bursa in January on a two-and-a-half-year deal .
Barcelona sell young forward Bojan Krkic to Italian side Roma in a deal worth $ 17.3 million . European champions have option to buy back 20-year-old in 2013 for $ 18.7 million . Bojan 's Spain under-21 teammate Diego Capel joins Portugal 's Sporting Lisbon . Turkish club Galatasaray sign Brazil midfielder Felipe Melo on loan from Italy 's Juventus .