Hector Bellerin did not get much playing time at Barcelona but said an emotional farewell to the fans and the club.
"Thank you Barcelona for making my dream come true. I want to thank my teammates, the coach and all the staff for everything. I send you all my best wishes," the former Betis and Arsenal player wrote.
The defender played seven competitive matches for the Catalan club but he was never a key player for Xavi Hernandez.
Pedro Porro's departure facilitated Bellerin's arrival at Sporting and the Spanish footballer hopes to get more playing time and a more prominent role in the Portuguese side.