[3] In March, Boca contested the regularity of the transfer and, refusing a €300,000 indemnification from Genoa, the Argentine club submitted the case to the AFA.

[5] On 8 November 2006, Forestieri made his official debut with Genoa in a Coppa Italia loss against Empoli.

[6] Forestieri made his Serie B league debut on 13 January 2007, on an away match lost 2–1 to Pescara, by scoring for Genoa.

In July 2009 Forestieri agreed for a move to La Liga, joining Málaga on loan from Genoa and Udinese.

Watford goalkeeper Manuel Almunia has claimed to see likenesses to Lionel Messi and says he has a bright future, but must avoid getting involved with referees.

[19] After a below par 2014–15 season (despite winning promotion to Premier League) with Watford, scoring only 5 goals in 25 games, mixed with the combination of constant manager changes, Forestieri found himself sliding down the pecking order at Vicarage Road.

Forestieri found himself subject to immense interest from clubs in the Championship including Leeds, Reading and Sheffield Wednesday.

On 29 August 2015 Sheffield Wednesday completed the signing of Forestieri on a four-year deal, for an undisclosed fee believed to be around £3,000,000.

[citation needed] He became the 14th summer signing by the Owls, and the 3rd to move from Vicarage Road to Hillsborough along with Lewis McGugan and Daniel Pudil.

[25] In January 2022, Forestieri left Udinese and headed to Asia, joining Malaysian giants Johor Darul Ta'zim on a two-year contract.

He won his first ever trophy in club football shortly after, when JDT defeated Kuala Lumpur City 3–0 to win the Piala Sumbangsih (Charity Shield), with one of the goals scored by Forestieri on his debut.

He has also been seen playing as a trequartista, a winger on both sides, and occasionally as a forward, making him a real offensive wild card.

For this reason, the coach Jos Luhukay in his seasons at Sheffield Wednesday, often played him as a right winger in a 4-2-3-1 or as a wide midfielder in a 4–4–2.