| 1. Sergey Kovalev began boxing and wrestling at age 11 in a challenging environment. |
| 2. He turned professional in 2009 because of corruption in amateur boxing in Russia. |
| 3. Kovalev's relationship with Natalya Kovaleva started in 2005. |
| 4. He has been a champion in Russia and won medals in Military Championships globally. |
| 5. Kovalev is famous for his knockout power, winning matches by knockouts. |
| 6. He faced a loss against Andre Ward in 2016. |
| 7. In his 2011 fight against Roman Simakov, Kovalev knocked down his opponent in the sixth round. Simakov suffered a traumatic brain injury during the fight, fell into a coma, and subsequently died without regaining consciousness. |
| 8. Sergey Kovalev began boxing at age 11 in Chelyabinsk, Kopeysk, after being invited by a classmate to a gym behind their school. |
| 9. He trained under Sergey Novikov from the beginning of his amateur career. |
| 10. He turned professional in 2008 and moved to America in 2009 because of corruption and intense politics in amateur boxing in Russia. |
| 11. His wife Natalya joined him in Fort Lauderdale, Florida, in 2012. |
