As one of the physical contests, boxing often gives birth to injuries and even death. Throughout the history of professional boxing, there are a number of events that are difficult to forget.

One of the most brutal moments in boxing in the modern era is when Evander Holyfield fought Mike Tyson. At that time, Tyson surprisingly bit part of Holyfield's right ear.

Luckily the incident did not take long because the boxers chose to make peace after years of arguing. But other brutal boxing battles did not end. Some boxers involved in the fight were later declared dead with very severe injuries.

Here are the four most epic battles that have occurred in professional boxing.

1. Evander Holyfield vs. Mike Tyson

Mike Tyson, who was mentioned as a successor to Muhammad Ali, was pushed to face Evander Holyfield in a heavyweight battle in 1997. In round 3, Tyson bit Holyfield's ear. At that time Mills Lane who tried the fight decided to reduce the Neck Concrete points.

However, moments later Tyson was seen doing the same thing so he was disqualified. Tyson's bite made Holyfield's ears no longer intact.

End of November 2013, Tyson returned Holyfield's ear pieces. Holyfield's body parts, said Tyson, are stored in formaldehyde.

2. Becky Zerlentes vs. Heather Schmitz

Female boxer Becky Zerlentes (34) was killed after fighting Heather Schmitz in the city of Denver in 2005. According to records, Zerlentes became the first boxer to die in the ring.

Despite wearing a head protector, Zerlentes remained knocked unconscious after receiving Schmitz's blow. Zerlentes had won the regional Golden Gloves championship in 2002 before deciding to hang boxing gloves. Before the battle that took his life, he told his coach that it would be the last fight.

3. Benny Paret vs. Emile Griffith

Benny "Kid" Paret died 10 days after fighting Emile Griffith in 1962. What happened in the fight was talked about as much as the fastest blow of all time.

The New York Times reported, Griffith had successfully hit Paret 29 times in a row in six seconds. The Paret was lying down until the referee finally stopped the fight.

The Cuban boxer was declared a coma before he died. The fight was adopted into a 2005 documentary entitled Ring of Fire: The Emile Griffith Story.

4. Duk Ko Kim vs. Kim Ray Mancini

Duk Ko Kim is a Korean boxer who escaped from KO after being hit by 39 blows when facing Kim Ray "Boom Boom" Mancini in the fight to win the WBA belt in 1982. Although he was desperately defending his body so it didn't collapse immediately, Ko Kim finally collapsed in The 14th round after staggering with Kim Ray's blow.

Referee Richard Green finally decided to stop the duel. Shortly afterwards Ko Kim was rushed to Desert Springs Hospital until finally declared dead four days later.