On April 8, 2017, a 34-year-old Petr Petrov (38-4-2, 19 KOs) got a shot at the lightweight WBO title held by 27-year-old British boxer Terry Flanagan (32-0, 13 KOs).
Petrov came in to the fight on a 6-fight win streak with a 43% KO rate, and was fighting after a gap of 6 months and 9 days. Flanagan was on a 32-fight win streak with a 40% KO rate, and fighting after a layoff of 4 months and 13 days.
Terry Flanagan defeated Petr Petrov via unanimous decision and successfully defended his WBO lightweight title. Flanagan improves his record to 33-0, while Petrov adds a loss to his record at 38-5-2.
On April 3, 2015, a 32-year-old Petr Petrov (35-4-2, 17 KOs) and Gamaliel Díaz met in the ring in a lightweight bout.
Petrov came in to the fight on a 3-fight win streak with a 41% KO rate, and was fighting after a gap of 10 months and 11 days.
Petr Petrov defeated Gamaliel Díaz via unanimous decision in the 10-round lightweight fight. Petrov improves his record to 36-4-2
On May 6, 2016, a 33-year-old Petr Petrov (36-4-2, 17 KOs) and Marvin Quintero met in the ring in a lightweight bout.
Petrov came in to the fight on a 4-fight win streak with a 40% KO rate, and was fighting after a gap of 1 year, 1 month, and 3 days.
Petr Petrov stopped Marvin Quintero via RTD in the 6th round. Petrov improves his record to 37-4-2 (18 KOs)
On February 11, 2012, a 28-year-old Petr Petrov (29-3-2, 13 KOs) and Sergio Jose Olivas met in the ring in a super-lightweight bout.
Petrov came in to the fight on a 1-fight losing streak with a 38% KO rate, and was fighting after a gap of 4 months and 19 days.
Petr Petrov stopped Sergio Jose Olivas via TKO in the 1st round. Petrov improves his record to 30-3-2 (14 KOs)
On April 4, 2009, a 26-year-old Petr Petrov (21-2-2, 9 KOs) and Maximo Diaz Ayca met in the ring.
Petrov came in to the fight on a 5-fight win streak with a 36% KO rate, and was fighting after a gap of 1 month and 28 days.
Petr Petrov stopped Maximo Diaz Ayca via KO in the 1st round. Petrov improves his record to 22-2-2 (10 KOs)
On September 20, 2019, a 36-year-old Petr Petrov (40-6-2, 21 KOs) and Dedrick Bell met in the ring.
Petrov came in to the fight on a 2-fight win streak with a 43% KO rate, and was fighting after a gap of 4 months and 10 days.
Petr Petrov stopped Dedrick Bell via KO in the 2nd round. Petrov improves his record to 41-6-2 (22 KOs)
On May 10, 2019, a 36-year-old Petr Petrov (39-6-2, 20 KOs) and Ruben Tamayo met in the ring.
Petrov came in to the fight on a 1-fight win streak with a 42% KO rate, and was fighting after a gap of 1 month and 17 days.
Petr Petrov stopped Ruben Tamayo via KO in the 2nd round. Petrov improves his record to 40-6-2 (21 KOs)
On February 7, 2009, a 25-year-old Petr Petrov (20-2-2, 8 KOs) and Armando Candel met in the ring.
Petrov came in to the fight on a 4-fight win streak with a 33% KO rate, and was fighting after a gap of 3 months and 7 days.
Petr Petrov stopped Armando Candel via TKO in the 2nd round. Petrov improves his record to 21-2-2 (9 KOs)
On June 26, 2020, a 37-year-old Petr Petrov (41-6-2, 22 KOs) and Michel Marcano met in the ring.
Petrov came in to the fight on a 3-fight win streak with a 44% KO rate, and was fighting after a gap of 9 months and 6 days.
Petr Petrov stopped Michel Marcano via KO in the 4th round. Petrov improves his record to 42-6-2 (23 KOs)
On March 23, 2019, a 35-year-old Petr Petrov (38-6-2, 19 KOs) and Hermin Isava met in the ring.
Petrov came in to the fight on a 2-fight losing streak with a 41% KO rate, and was fighting after a gap of 1 year and 14 days.
Petr Petrov stopped Hermin Isava via TKO in the 3rd round. Petrov improves his record to 39-6-2 (20 KOs)