Barcelona In August 2007, Assulin graduated to the
FC Barcelona B team, and was offered a new contract, a senior contract (a contract granted only after the player turns 16) for another three years and a €20 million buy-out clause. At the end of the 2007–08 season, Barcelona B won the league title with 83 points, and the manager,
Pep Guardiola, was promoted to the job of senior team manager. Assulin was rumored to be one of the players that Guardiola would promote to the first team. After missing most of the 2008–09 season due to injury, Assulin received an invitation to participate in pre-season matches with the Barcelona first team. He made his debut first-team start in a competitive match of the
Copa del Rey against
Cultural Leonesa on 28 October 2009, before being replaced by
Eric Abidal after 56 minutes. Due to the lengthy 2009–10 season, many Barcelona players were given breaks towards the end of the year, so on 29 December 2009 Guardiola brought in Assulin and his teammates
Víctor Vázquez,
Thiago Alcântara and
Jonathan dos Santos. On 1 July 2010, Assulin and Barcelona parted ways by mutual consent. They offered him a three-year contract but as they could not offer him a guaranteed first-team squad position and instead sought to develop him at Barcelona B, he refused the offer. Assulin also had a complicated relationship with the manager of Barcelona B,
Luis Enrique.
Manchester City On 14 December 2010, Assulin joined
Premier League club
Manchester City on a two-and-a-half-year deal. He spoke of his wishes to partner his former Barcelona teammate
Yaya Touré at the club. The early part of 2011 saw Assulin make his City Reserve squad debut against
Newcastle United, coming on as a second-half substitute in a 5–1 win. On 17 November 2011, Assulin declared that he was prepared to be loaned out from Manchester City in order to receive first-team action. He had so far failed to receive a call-up from first-team manager
Roberto Mancini but was too old to play in the inaugural under-19
NextGen series with the
City Elite Development Squad, restricting him to playing occasionally for the Reserves. Assulin said: "I need confidence and I can only get that by playing regularly. City and I both feel that I should go out on loan so I can play every week. I could stay in England or maybe join a team in the Spanish second division". Six days later,
Championship side
Barnsley announced that they had agreed a loan deal until 3 January 2012, with their manager
Keith Hill saying that he was impressed by his performance for Israel under-21 against England at the club's
Oakwell ground that September. After fitness issues came up, the deal collapsed. On 9 February 2012, Assulin scored for the
Manchester City Elite Development Squad in their 4–2 derby win over rivals
Manchester United. He entered the
Manchester Senior Cup tie at half-time as a substitute for
Denis Suárez, and scored their 2–2 equaliser in the 65th minute and he also assisted for the fourth goal in stoppage time. Eight days later, Assulin, along with fellow City youngster
Abdul Razak, joined
Championship side
Brighton & Hove Albion on an initial one-month loan until 19 March, but with the option to extend this by two months. Manager
Gustavo Poyet described the loan move for Assulin as a "no-brainer" and a "unique opportunity." Assulin made his Brighton debut on 22 February against
Hull City, coming on as a substitute for Razak in the 77th minute of their 0–0 draw. He made his first start against
Cardiff City on 7 March and was substituted after 59 minutes of a 2–2 home draw. On 19 March, after one start and three substitute appearances, Brighton exercised their option to extend Assulin's loan deal until the end of the season. Assulin was released from Manchester City on 22 May 2012, alongside
Owen Hargreaves.
Later career On 11 July 2012, Assulin signed a one-year deal with recently relegated
Racing de Santander. Six days later, he was introduced as a player in a press conference. On the opening game of
the season on 19 August, he made his debut in a 1–0 loss against
Las Palmas; he soon scored his first goal, on 15 September, in a 3–0 win over
Recreativo de Huelva, giving the club their first win of the campaign. On 5 July 2013, Assulin signed a three-year deal with
Granada CF, being immediately loaned to
Segunda División's
Hércules CF in a
season-long deal. He appeared regularly for the
Valencian outfit, which were relegated after finishing dead last. In his second game, a goalless draw at
CD Tenerife on 25 August, he was sent off for kicking out at
Carlos Ruiz. On 15 August 2014, Assulin signed a two-year deal with
RCD Mallorca, also in the second level. In October 2015, free agent Assulin trialled with
Rangers of the
Scottish Championship; Manager
Mark Warburton was not sufficiently impressed to offer him a contract. After a brief spell at
Hapoel Tel Aviv – his first experience of the
Israeli Premier League – he went back to Spain to sign for
CE Sabadell FC in the third tier on 10 August 2016. He departed the Catalan club in January 2018 after his contract was terminated by mutual consent. On 13 February 2018,
Kazakhstan Premier League side
FC Kairat announced the signing of Assulin on a two-year contract. On 30 March, it was cancelled by mutual consent. On 26 September 2019, Assulin signed a two-year contract with
Liga I club
Politehnica Iași. On 13 February 2021, he was announced as a new player for Italy's
Serie D club
Crema. He left the club by the end of the season. == International career ==