Barcelona outcast Cristian Tello has reportedly told the club he wants to leave in the summer, with Liverpool and Porto both interested.Tello has become something of a forgotten man this season at Barcelona, under Tata Martino, despite impressing for the Catalans last campaign, scoring seven goals in 22 league appearances. The 22-year-old, though, has been limited to just two La Liga starts this season and has failed to complete 90 minutes in either of those starts for Barca, and has scored just once in 20 appearances.Despite Tello having four years left to run on his deal with Barcelona, Spanish newspaper Sport claim that the winger has informed the club of his desire to leave the Nou Camp this summer. That could potentially open the door for Liverpool to make an offer for Tello in the summer, with the Merseyside club looking to sign players ahead of a return to Champions League football next season.However, Tello is understood to want to leave for first-team football, which he would be more likely to get at Porto, rather than Liverpool, who are also tracking the once-capped Spanish international’s situation.