The world of Combat Sports -- MMA and Professional Boxing -- has seen several high-profile returns, rematches and retirements in the year '2020'.

READ | Motorsport in 2020: F1, MotoGP, Le Mans, W Series and Formula E highlights

Here are some of the most important UFC and Boxing moments from the year that's coming to an end, which includes a few impressive title wins and defenses.

January 19:  Former featherweight and lightweight champion   Conor McGregor beats Donald Cerrone in just 40 seconds at UFC 246 on his return to the octagon after 469 days. His win in the welterweight main event clash makes him the first UFC star to claim knockout victories in three different divisions.

RELATED | Basketball in 2020: NBA, WNBA highlights of the COVID-hit year

February 22:  Great Britain's   Tyson Fury defeats American boxer Deontay Wilder in seven rounds via technical knockout in a rematch at the MGM Grand Arena, Nevada, to win the WBC and the vacant 'The Ring' and lineal heavyweight titles after playing out a controversial split draw in December 2018.


March 7:  UFC strawweight champion Zhang Weili defeats No. 1 contender Joanna Jedrzejczyk in an instant classic at UFC 248. The co-main event encounter, which tops the 2020 UFC Fight of the Night rankings, is awarded to Weili by a very close split decision (48-47 twice and one 47-48).

ALSO READ | Football in 2020: Highlights of the coronavirus-hit year

May 9:  UFC bantamweight champion and former flyweight titleholder Henry Cejudo announces retirement after beating Dominick Cruz in round two of UFC 249's co-main event. However, a few days later, he claims to be interested in a featherweight title fight against Alexander Volkanovski.

June 6:  Brazilian MMA artist Amanda Nunes becomes the first fighter in UFC history to defend one title (women's featherweight) while still holding a belt from another weight division (bantamweight). She defeats Canada's Felicia Spencer in the main event of UFC 250 by unanimous decision.


Joanna Jedrzejczyk (L) and Zhang Weili fighting at UFC 248 for the strawweight championship.


August 15:  Former UFC heavyweight and light heavyweight champion Daniel Cormier, who is also a commentator, announces retirement at UFC 252 in Las Vegas, Nevada, after losing to reigning heavyweight titleholder Stipe Miocic for a second consecutive time.

RELATED | Tennis highlights of 2020: Nadal 20, rise of Thiem and Kenin; Osaka makes statement

October 17:  United States boxer Teofimo Lopez upsets the experienced Ukrainian Vasyl Lomachenko via unanimous decision (116-112, 119-109, 117-111) at the MGM Grand Conference Centre in Nevada to unify the WBA (Super), WBO, 'The Ring', IBF and lineal lightweight belts. 

October 24:  UFC lightweight champion Khabib Nurmagomedov, who is undefeated with a 29-0 MMA record, announces retirement after beating interim titleholder Justin Gaethje in the main event of UFC 254. Now, talks are swirling about a possible Khabib comeback for a super-fight in 2021.


The Mike Tyson vs Roy Jones Jr match marked the return of the 54-year-old Tyson after 15 years, while Jones (51) fought after a gap of two years.


November 28:  Former   undisputed world heavyweight boxing champion Mike Tyson and former four-division (middleweight, super middleweight, light heavyweight and heavyweight) titleholder Roy Jones Jr play out a draw in an eight-round exhibition fight at the Staples Centre in Los Angeles, California.

READ | Golf in 2020: Highlights of the coronavirus-hit year

December 12:  Unified WBA (Super), IBF, WBO and IBO world heavyweight boxing champion from the United States -- Anthony Joshua -- defeats the IBF's mandatory challenger from Bulgaria, Kubrat Pulev, at the SSE Arena adjacent to Wembley Stadium in London to retain his titles.

December 19:  Mexican professional boxer Canelo Alvarez beats Great Britain's Callum Smith after 12 rounds in a unification bout for the WBA and vacant WBC super-middleweight titles via unanimous decision at the Alamodome in San Antonio, Texas.