UFC 140: Jones vs. Machida was a mixed martial arts event held by the Ultimate Fighting Championship on December 10, 2011 at the Air Canada Centre in Toronto, Ontario. It was the penultimate event for the UFC in 2011. The event featured eight bouts televised internationally, seven preliminary bouts aired on cable in the United States and Canada, and three preliminary bouts streamed live on Facebook. In the co-main event, Frank Mir became not only the first man to knock out Antônio Rodrigo Nogueira, but also the first man to submit him when Mir used a kimura on Nogueira that ultimately broke his arm. Lyoto Machida also suffered his first ever submission loss at the hands of Jon Jones, in the main event, where Jones defended his UFC Light Heavyweight Championship title.

A bout between Lyoto Machida and Phil Davis was initially announced by UFC President, Dana White, to happen at UFC 140. However, White admitted to "[jumping] the gun" on the announcement after discovering that Davis was still recovering from a knee injury. Early reports also included a Light Heavyweight Championship bout between Jon Jones and Rashad Evans. First, Evans would need to be medically cleared following an operation that required pins to be inserted into his right hand due to an injury during his technical knockout victory over Tito Ortiz. When it became clear that Evans would not be ready for the fight he was replaced by Machida for the championship bout.

Francisco Santos Miranda, III (born May 24, 1979), better known as Frank Mir, is an American mixed martial artist, as well as a black belt in Brazilian Jiu-Jitsu and Kenpō Karate.

Mir, one of the most accomplished heavyweights in MMA history, is a two time UFC Heavyweight Champion . He currently holds the record for most victories in the heavyweight division of the UFC with 14 and most wins by submission in UFC Heavyweight division history with 8. He is also the only man in UFC history to win a bout by toe hold. As of January 2012 he is ranked the #4 In the ESPN MMA Power Rankings.He holds the distinction of being the first and only man to both knock out and submit MMA legend Antônio Rodrigo Nogueira. Mir is the only person to submit former UFC Heavyweight Champion and NCAA Division I wrestler Brock Lesnar and highly regarded striker Cheick Kongo. Frank Mir has had more fights in the UFC than anyone else currently competing in the heavyweight division.

His father convinced him to begin wrestling, on the basis that it could help him avoid submissions. Mir then began wrestling at Bonanza High School in Las Vegas, Nevada where during his junior year he lost his first nine matches. During his senior year (1998) he went 44–1 and won the state championship. He was also on the school's football team that reached the Southern Zone semifinals in 1997 and where he played as fullback and defensive end. He also took up track and field in 1998 where his discus throw of 177 feet, 10 inches is still a Sunset Regional record.

Dana White (born July 28, 1969) is the current President of the Ultimate Fighting Championship (UFC), a mixed martial arts organization based in the United States.

Born in Manchester, Connecticut on July 28, 1969, White grew up in Las Vegas, Nevada, Ware, Massachusetts and Levant, Maine. White is a passionate Boston Red Sox fan. During his youth, he bounced back and forth between Boston and Maine. He attended the University of Massachusetts Boston but did not finish; however, while there he did launch a boxing program for inner-city youth.

White has a background as an aerobics instructor. In 1992, White established Dana White Enterprises in Las Vegas. He conducted aerobics classes at three gyms in the Las Vegas area and began managing MMA fighters Tito Ortiz and Chuck Liddell.

While working as a manager, White learned that Semaphore Entertainment Group, the parent company of the UFC, was looking for a buyer for the UFC. White contacted childhood friend Lorenzo Fertitta, an executive at Station Casinos, and a former commissioner of the Nevada State Athletic Commission. Within a month, Lorenzo and his older brother Frank bought the UFC, with White installed as its president. White currently owns about 9% of Zuffa, LLC, the entity the Fertitta brothers created to own and manage the UFC.

Mark "The Machine" Hominick (born July 22, 1982) is a Canadian mixed martial artist, former TKO Featherweight Champion, and current UFC fighter.

As a teen he attended Ingersoll District Collegiate Institute. He was trained by the late great MMA striking coach Shawn Tompkins with Sam Stout at The Adrenaline Training Center in London, Ontario, where he also works as an instructor.

Hominick has fought at both Featherweight and Lightweight during his professional career. He has appeared in many organizations including the UFC, Affliction, TKO, and WEC.

He was scheduled to fight Deividas Taurosevičius on October 10, 2009 at WEC 43., but was forced to withdraw due to an injury.

Hominick was scheduled to face Yves Jabouin on January 10, 2010 at WEC 46, but Jabouin was forced off the card with an injury. Hominick instead faced WEC newcomer Bryan Caraway, winning by submission in the first round.

The fight eventually took place on June 20, 2010 at WEC 49. Hominick won via TKO in the second round. They both won a Sherdog award for best round of 2010.

Lyoto Carvalho Machida (Portuguese pronunciation: [liˈotu maˈʃidɐ]; born May 30, 1978) is a Japanese-Brazilian mixed martial artist from Salvador, Bahia, Brazil who fights as a light heavyweight in the Ultimate Fighting Championship. He is a former UFC Light Heavyweight Champion and is currently ranked as the #6 light heavyweight fighter in the world by Sherdog, MMAWeekly and Yahoo! Sports.

Machida was born in the city of Salvador as the third son of the highly ranked head of the Brazilian branch of the Japan Karate Association, Shotokan karate master Yoshizo Machida. Yoshizo moved to Brazil from Japan when he was 22 years old. There he met and married Lyoto's mother, Ana Claudia. Growing up in Belém, Lyoto began training in karate at the age of three and earned his black belt at the age of thirteen. He also began training in sumo at twelve and Brazilian Jiu-Jitsu at fifteen. He won a number of amateur karate tournaments, including the 2001 Pan American Karate tournament.

He was the runner-up in the 2000 Brazilian Sumo Championships in the 115 kg division. As an adult, he became Brazilian Champion twice under Taylor Swanson, and placed second in the South American Championship. He defeated American black belt Jiu-Jitsu fighter Rafael Lovato Jr. at L.A. Sub X. In addition to his sumo and karate achievements, he has a college degree in Physical Education. Lyoto's brother, Chinzô, is a Shotokan vice-champion (Australia 2006), losing only to number-one ranked Shotokan master Koji Ogata. Lyoto and Chinzô fought in a Karate Final 10 years ago in which Lyoto gave Chinzô a cheek scar that still exists today. His other brothers include Kenzo Machida, a TV journalist for one of Brazil's biggest TV stations, Take Machida and adopted brother Francisco Machida.