UFC 37: High Impact was a mixed martial arts event held by the Ultimate Fighting Championship at the CenturyTel Center in Bossier City, Louisiana on May 10, 2002. The event was seen live on pay per view in the United States, and was later released on home video.

The card was headlined by a Middleweight Title Bout between Murilo Bustamante and Matt Lindland, and featured the first UFC appearances of Robbie Lawler and Ivan Salaverry.

The fight between Bustamante and Lindland has led to the contest being known as the infamous "double tap" fight. Bustamante had Lindland hooked cleanly in an armbar early in the fight, then released it after what seemed to be a tap, followed by a shout to stop the action by John McCarthy. Lindland claimed it wasn't a tap, which controversially led McCarthy to restart the fight. Many thought that this was a mistake by McCarthy to stop the fight considering it was probably the only way for Lindland to escape the armbar.

Bustamante was stripped of the title in October 2002 after signing with PRIDE, thereby vacating the UFC Middleweight Championship belt.

Murilo Bustamante (Portuguese pronunciation: [muˈɾilu buʃtɐˈmɐ̃tʃi]; born July 30, 1966 in Rio de Janeiro) (Japanese pronunciation: [Murīrobusutamante]; is a Brazilian mixed martial artist and former UFC Middleweight champion. He is one of the founders of the Brazilian Top Team and is the current leader. He holds notable victories over Dave Menne (twice), Matt Lindland and Ikuhisa Minowa.

Murilo Bustamante is a black belt under the renowned Carlson Gracie. He has won numerous world titles in Brazilian Jiu Jitsu, which includes the World Championships of Jiu-Jitsu. His impressive MMA resume includes wins over Jerry Bohlander of the Lion's Den, Ikuhisa Minowa, Ryuta Sakurai (twice), Dave Menne (which won him the UFC middleweight championship) and undefeated top ranked Middleweight Matt Lindland .

Mitsuyo "Count Koma" Maeda → Carlos Gracie, Sr. → Carlson Gracie → Murilo Bustamante

Murilo's grappling accomplishments include Championships at the World Class level, as well as appearances at the ADCC World Submission Wrestling Championships. In Brazilian Jiu-Jitsu, he has won The Mundials World Championships in 1999 and has won the Brazilian National Championship 4 times.

Matthew James Lindland (born May 17, 1970) is an American mixed martial artist, Olympic wrestler and politician. He won the Oregon Republican Party's nomination for the Oregon House of Representatives, District 52 seat on May 20, 2008.

Lindland started wrestling at age 15 at Gladstone High School in Gladstone, Oregon. In 1991, he won the junior college 158 lbs national title wrestling for Clackamas Community College.

Lindland then went on to wrestle at the University of Nebraska, Division 1 of the NCAA. He won the Big Eight title at 158 in 1993. Following up that title, Lindland had a record of 36-0 for the 1993 season going into the National Tournament, and was the #1 ranked wrestler for his weight class. He suffered an upset in the first round of the tournament however, and did not place. Following his college career Lindland began to compete in both Freestyle and Greco-Roman events, finding success in both but ultimately deciding to concentrate all his effort upon the Greco-Roman style.

Charles David "Chuck" Liddell (born December 17, 1969) is a retired American mixed martial artist and former Ultimate Fighting Championship light heavyweight champion. Liddell has an extensive striking background in Kempo, Koei-Kan karate and kickboxing, as well as a grappling background in collegiate wrestling. Liddell is known for his Knockout power, Iron chin, Excellent counter striking and for his sprawl-and-brawl technique, which made him one of the most difficult fighters to takedown. He is one of the most dominant champions that ever competed in the UFC. He still holds the record for the most knockouts in UFC history. As of his retirement, Liddell has had 23 fights in the UFC. Along with fellow UFC Hall of Fame fighter Randy Couture, Liddell is widely credited for bringing mixed martial arts into the mainstream of American sports and entertainment. On July 10, 2009, he was inducted into the UFC Hall of Fame.

Liddell began studying Koei-Kan karate at the age of 12; the tattoo seen on his scalp reads "Koei-Kan". Liddell was a four-year starter on the football team at San Marcos High School. While growing up in Santa Barbara, he often frequented the infamous Del Playa Drive, the middle of the party scene of the college town of Isla Vista, where he often found himself in fights with drunk college students. He became a Division I wrestler at California Polytechnic State University, San Luis Obispo and graduated with a Bachelor of Arts Degree in Business/Accounting in 1995. He holds an amateur kickboxing record of 20 wins and 2 losses, with 16 of his wins coming by way of knockout.

Vítor Vieira Belfort (Portuguese pronunciation: [ˈvitoʁ viˈejɾɐ bɛwˈfɔʁ]; born April 1, 1977) is a Brazilian mixed martial artist and former UFC Light Heavyweight Champion. Belfort was born in Rio de Janeiro and studied jiu-jitsu with the Gracie family, namely Carlson Gracie. He received a black belt under Carlson and currently trains with Xtreme Couture, fighting in the middleweight division. He is currently ranked as the #3 middleweight in the world by MMA Weekly.

Vítor was born on April 1, 1977 in Rio de Janeiro, Brazil to a French father and a Greek mother. Belfort is married to Joana Prado and together they have three children, a son named Davi (born February 5, 2005), a daughter named Victoria (born October 31, 2007), and a daughter named Kyara (born June 7, 2009).

Belfort also had a small part in a reality show on Brazilian television and appeared next to his wife when she was photographed for the Brazilian edition of Playboy.

On January 9, 2004, Vítor's sister, Priscila Belfort disappeared and the relatives received no information about her. In August 2007, a woman (identified as Elaine Paiva) confessed that she participated in her kidnapping and killing and that she was kidnapped to pay off a four thousand dollar debt Paiva had with drug dealers. Paiva was arrested along with three others alleged to be involved in the kidnapping. The group allegedly buried her body in the woods in Rio de Janeiro where police conducted searches but her remains have never been found. Her family however do not accept this version and believe that Priscila is still alive somewhere. Vítor still maintains a missing sign in the Brazilian version of his website.