The Barcelona winger was due to stay in Portugal until the summer but has cut short his stay to move to Serie A, where he will aim to help revive his new club's Scudetto bid
Cristian Tello has joined Fiorentina on loan until the end of the season after the Barcelona winger's temporary deal with Porto was rescinded.
Tello was sent to Porto for a two-year loan in July 2014 and has played 33 games in his time at Estadio do Dragao, scoring eight goals.
He has made only four starts in the league this season, however, and will now move to the Stadio Artemio Franchi to bolster a Fiorentina side challenging for the Serie A title.
A Barcelona statement read: "FC Barcelona and ACF Fiorentina have reached an agreement for the loan of Cristian Tello until 30 June 2016, his current loan agreement until the end of the season with FC Porto is rescinded.
"With this new loan, ACF Fiorentina will take over the conditions of the agreement between FC Barcelona and FC Porto."
Fiorentina sit six points adrift of Serie A leaders Napoli and have already signed Mauro Zarate and Tino Costa this month.
- Goal