Early career Born in
Montana, Petrov started to play football in the local team
FC Montana. At the age of 18 he was spotted by scout and coach
Dimitar Penev and signed with
CSKA Sofia for fee of €30,000. With his new club, he won the
Bulgarian Championship in 1997 and the
national cup in 1997 and 1999.
Celtic Petrov was signed in the summer of 1999 by
John Barnes for a fee of £2.8 million. The teenager featured prominently in a season where he won the
League Cup with Celtic, his second major honour and the first of many with Celtic. Despite the happy end to the season Petrov had a very hard time starting with the club. He was homesick and lonely at the start, and could not speak English. This was made worse by the manager playing him out of position at right back. Eventually, he improved his English by working in a friend's burger van. This hard work and determination to fit in showed in his performances for the club. After a good first season with Celtic he enjoyed a brilliant second season under
Martin O'Neill's treble winning side, becoming a regular scorer netting 7 league goals in 28 appearances, one of which was in Celtic's 6–2 victory over Rangers. He also became the first foreign player to win the
SPFA Young Player of the Year award. However he missed the end of the season after breaking his leg in a league game against
St Johnstone and missed both the
Scottish League Cup and
Scottish Cup finals as a result. and then really came into form for Celtic, being described as a dynamic, hardworking
box-to-box midfielder, In his fourth season with Celtic, Petrov continued his good form and was being linked to some of the top clubs in Europe but after protracted contract talks he eventually agreed a new deal with Celtic. along with his third SPL medal. The 2004–05 season was Martin O'Neill's last at Celtic, although Stiliyan Petrov would later join him at Aston Villa. The season also saw Petrov becoming the third player to win the
Celtic Player of The Year award. The 2005–06 season was a time of great change for Celtic. Martin O'Neill, the club's most successful manager in 20 years, left and new manager
Gordon Strachan came in. Things started badly for Celtic as they lost 5–0 to Slovak minnows
Artmedia Bratislava in Strachan's first match. Celtic then managed to throw away a 3–1 lead over
Motherwell to draw Strachan's first league match 4–4, although Petrov later helped Celtic exact revenge over the
Fir Park side by scoring his first hat-trick in a 5–0 demolition in October that year. Celtic overcame their bad start to the campaign to win the SPL and League Cup double. The 2005–06 season proved to be his last at Celtic as he re-united with former manager Martin O'Neill at Aston Villa for a fee of £6.5 million (rising to £8 million after clauses). He only made three appearances for Celtic before leaving in the summer transfer window. In all, Petrov made 312 appearances for Celtic over seven years, scoring 55 goals. He won the SPL four times and also won both the Scottish and Scottish League Cup 3 times each. He was the tenth most prolific goalscorer in the SPL (55 goals) when he left Celtic. Petrov was also shortlisted for the
SPFA Players' Player of the Year three times as a Celtic player.
Aston Villa in 2008 In April 2006, Celtic rejected a written transfer request submitted by Petrov. He was subsequently linked with a transfer to move to
Aston Villa who were managed by former Celtic boss
Martin O'Neill. On 30 August 2006, 27-year-old Petrov completed his move to
Villa Park on a four-year deal worth £6.5 million, becoming O'Neill's first signing for Villa. On 20 May 2009 he signed a new four-year deal that is set to keep him at the club until 2013. Following the retirement of captain
Martin Laursen, Petrov stated that leading a "great club with a long tradition and history" would be "a great honour". Petrov became Villa captain in the summer of 2009 and led the team to sixth place in the Premier league, the semi-finals of the FA Cup and the final of the League Cup in his first season holding the armband. Petrov continued to retain the Villa captaincy after the appointment of
Gérard Houllier as manager of the club. On 23 October 2010, he sustained a knee injury in the 1–0 away loss against
Sunderland at the
Stadium of Light. On 26 December 2010, Petrov returned to first team action, coming on as a second-half substitute for
Jonathan Hogg in the 2–1 defeat against
Tottenham Hotspur at
Villa Park. On 26 February 2011, Petrov made his 150th premier league appearance for Aston Villa at Villa Park, when he came on as a second-half substitute in the 76th minute for
Robert Pires in the 4–1 win over
Blackburn Rovers. On 10 September 2011, Petrov scored his first goal of the season away at Everton. On 29 October 2011, Petrov made his 200th appearance for Aston Villa in the Premier League clash with
Sunderland, and scored the opening goal in a 2–2 draw.
Career break due to leukaemia Petrov announced his retirement from football on 9 May 2013, due to his leukaemia. On 26 May 2013, footballers who had represented the Bulgaria national side (including
Hristo Stoichkov,
Dimitar Berbatov and
Nasko Sirakov) won 4–2 against a selection that featured Aston Villa veterans like
Mark Kinsella and
Bryan Small in an exhibition game that took place at the
Vasil Levski National Stadium in
Sofia and had been organised to honour Petrov's achievements. In October 2014, Petrov began playing again for his local
Sunday League Over-35s side Wychall Wanderers In April 2016, Petrov revealed he was training with
Villa's Under-21 side with a view to returning to the professional game. In June, it was announced that he would be training with the first team during their pre-season tour of Austria, on a non-contractual basis. On 9 July 2016, Petrov played his first game with the Aston Villa first team since his illness, taking part in an 8–0 friendly victory over local Austrian team
GAK. ==International career==