For season 2005 Petrescu joined Veikkausliiga team Inter Turku. where he quickly established his place in the midfield and scored seven goals during the season. During season 2006 he gained 20 caps and scored three goals.
In December 2006 Petrescu signed a two-year contract with Tampere United. He stated that his main reason to join Tampere United was coach Ari Hjelm. Season 2007 was a true break through for Petrescu to the elite of Veikkausliiga. He was one of the key players that led the team two a second consecutive championship. During the second qualifying round of the 2007/2008 Champions League edition, Petrescu scored a goal to help Tampere secure a prestigious 1:0 win against Bulgarian champions Levski Sofia in their home game. Tampere repeated the feat in the away game and became the first Finnish side to eliminate a Bulgarian club from the high-profile competition. However, the Finns were unable to qualify for the group stages of the Champions League, as they were eliminated by Norwegian side Rosenborg BK in the third qualifying round. In 2007, he was selected as the best footballer of Pirkanmaa. He was loaned to Italian Ascoli for the spring of 2009. In Ascoli he made his first appearance on 7 March in a match against Grosseto.
In January 2011 Petrescu joined Greek side Panthrakikos on a 1,5 years contract. He made just one appearance in the first team.
Honka
Petrescu represented seasons 2011-12 FC Honka in the Veikkausliiga. He gained 32 caps and scored two goals.
Haka
Petrescu transferred to FC Haka for the season 2013. During the fall of 2013 he made a short spell in Romanian first division side CSM Studențesc Iași.
Ilves
After season 2013 he moved on to Ilves on a three-year contract.
JJK
On 23 June 2016, he returned to JJK on a three-year contract.
International career
Petrescu became well known after playing in the 2003 FIFA U-17 World Championship, which were held in Finland where he scored two of three goals of Finland. He scored a goal in the opening game against China in the tournament. He was nominated as candidate by head coachMarkku Kanerva for the Finland U-21 team for the 2009 UEFA European Under-21 Championship finals but he suffered an injury one month prior to the tournament and was forced to withdraw.
Personal life
Petrescu's father is Romanian and he has got an older brother, Ștefan Petrescu, who also plays football.
