Drummer and composer, he began the activity of jazz drummer at the end of the 70s and gradually established itself on the national scene collaborating with prestigious Italian and foreign musicians, including: Enrico Pieranunzi, Massimo Urbani, Antonello Salis, Maurizio Giammarco, Pietro Tonolo, Rita Marcotulli, Stefano Battaglia, Enrico Rava, Chet Baker, Lee Konitz, Mal Waldron, Kenny Wheeler, Toots Thielemans, Paul Bley, Johnny Griffin, John Scofield, Pat Metheny.
The experience from 1983 to 1992 with the pianist Enrico Pieranunzi and the double bass player Enzo Pietropaoli was significant; their "Space Jazz Trio" won, among other things, in 1988 and 1989, the critics' referendums held by the magazine "Musica Jazz", respectively as the best record and best formation of the year.
Ten years later, in '98 and '99, and then again in 2001 and 2003, the same referendums go to " Doctor 3 ", a trio created by Sferra in '97, with Danilo Rea on piano and Pietropaoli himself on bass, a group that represents, inter alia, in January 2001, the Italian jazz in the historic " Town Hall " in New York.
In more than three decades of activity, he had taken part in many international music festivals, including: Umbria Jazz, Clusone, Ravenna, Rome, Berlin, Frankfurt, Cologne, Madrid, Cophenaghen, Singapore, Nuova Dhely, Beijing, Chicago, LosAngeles, S.Francisco, Santiago de Chile, São Paulo, Rio de Janeiro, Buenos Aires, San Sebastian.
He currently works with Doctor 3 together with Danilo Rea and Enzo Pietropaoli, with the Tribe quintet of Enrico Rava, with the Fabio Zeppetella Quartet, with the Trio Battisti - Traenti - Sferra, with the Grace in Town project together with Costanza Alegiani.
In more than three decades he has carried out, and hasn't stopped, teaching activities on the national territory, with seminars and master classes.