Ignacio David Fideleff (born 4 July 1989) is an Argentine-Israeli footballer of Russian-Jewish descent.
He used to play for Primera División side Tigre on loan from Serie A team Napoli.
Fideleff was born in Rosario, Santa Fe and grown up as a footballer in Club Atlético Newell’s Old Boys’s youths.
He made his debut for the Newell’s first team on 24 March 2008 against Lanús, scoring a goal.
He played for the club for five seasons, collecting 35 appearances in Argentine Primera División, scoring 3 goals.
At the start of the 2011–12 season, Fideleff was purchased by Serie A club Napoli, for a reported fee of around €3m, believed to be a substitute for Spaniard Víctor Ruiz who was sold to Valencia.
He debuted in Serie A on 21 September 2011, featuring in the starting line-up against Veronese club Chievo.
On 14 July 2012, Fideleff joined Parma on a loan deal for the 2012-13 season.
On 30 January 2013, Fideleff joined Maccabi Tel Aviv on a loan deal for the remainder of the season. The deal came through after Fideleff received an Israeli citizenship due to his Jewish origins.
On 5 August 2013, Fideleff returned to Argentina to join Tigre on a season-long loan.