[4] In July 2007, Izmailov was loaned for one season to Sporting CP, making his official debut in the Supertaça Cândido de Oliveira on 11 August, against FC Porto in Leiria.

[11] He returned to training following coach Paulo Bento's dismissal, in late November 2009, but spent most of the following years on the sidelines nursing the same injury,[12] and quarreling with Sporting's board of directors over the issue.

[13] On 7 January 2013, after passing the pertinent medicals, Izmailov joined Porto on a two-and-a-half-year contract, with Miguel Lopes moving in the opposite direction.

[15] On 31 January 2014, after spending four months in his country due to family reasons, Izmailov signed for Gabala FK in the Azerbaijan Premier League on loan until the end of the season, rejoining former Lokomotiv coach Yuri Semin who he worked with nine years ago.

[22] On 9 June 2017, Izmailov joined Russian Professional Football League club FC Ararat Moscow, where he shared teams with fellow former internationals Roman Pavlyuchenko and Aleksei Rebko.

[24] Izmailov made his debut with Russia aged just 19,[25] and was summoned for the squads at the 2002 FIFA World Cup and UEFA Euro 2004, playing twice in each of those tournaments.