On 26 June 2007, Bergessio signed a five-year deal with Primeira Liga club S.L. Benfica for a reported €2.5 million fee, as an unknown party remained eligible to 50% of the future transfer fee the Portuguese received. He only appeared in three league matches during his spell, one more than his opportunities in the UEFA Champions League, and, in January of the following year he returned to his country. In January 2008, Bergessio joined San Lorenzo de Almagro. On 8 May, he was involved in the Copa Libertadores tie against River where, after his team had two players sent off and were 0–2 down, he scored twice to give it an improbable aggregate win.
Saint-Étienne
On 25 August 2009, Bergessio returned to Europe by agreeing to a four-year contract with France's AS Saint-Étienne, for an undisclosed fee. He scored his first goal for his new club during his second appearance, a 1–1 home draw against AJ Auxerre, but netted just five times more in his first one and a half seasons with the Ligue 1 club.
Catania
In the last hours of the 2011 winter transfer window, Bergessio joined Italian side Calcio Catania, arriving on loan for the remainder of the season – the Sicilians had the option to sign him player permanently at the conclusion of this loan agreement. He made his Serie A debut on 20 February, playing the full 90 minutes and being booked in a 0–1 away loss against S.S.C. Napoli. After an initial delay in the transfer, Bergessio signed with Catania permanently on 29 August 2011 on a four-year contract while a transfer fee of €945,000 was paid to Saint-Étienne. In the 2012–13 campaign he became a key part of Rolando Maran's team, forming an efficient offensive partnership with countrymen Pablo Barrientos, Lucas Castro and Alejandro Gómez; he scored his first hat-trick in Italy's top flight on 5 May 2013, in his team's 3–0 home win over A.C. Siena. Bergessio helped Catania eventually finish in eighth position, with a record in total points for the fifth consecutive season. On a personal level he was also the club's highest goalscorer during a single campaign, since Gionatha Spinesi netted 17 times in 2006–07. On 30 October 2013, Bergessio suffered a broken fibula as a result of a late tackle by Giorgio Chiellini in Catania's 0–4 loss at Juventus FC.
Sampdoria
On 1 August 2014, Bergessio was sold to Serie A club U.C. Sampdoria for a fee of €2.65 million, putting pen to paper to a three-year deal. On 3 June of the following year, after 24 appearances all competitions comprised and two goals, he was released by mutual consent.
Later years
Bergessio moved teams and countries again on 24 June 2015, joining Club Atlas from Mexico. The following 8 September, he signed a one-year deal with former club San Lorenzo.
International career
Bergessio made his debut for Argentina on 15 October 2008, playing the second half of a 0–1 loss in Chile for the 2010 FIFA World Cupqualifiers. He scored his first and only two goals for his country on 20 May of the following year, in a 3–1 win over Panama.
