The ATP Challenger Tour, known until the end of 2008 as the ATP Challenger Series, is a series of international men's professional tennis tournaments. It was founded in 1976 when it replaced the ILTF Satellite Circuit as the second tier of tennis. The Challenger Tour events are the second-highest tier of tennis competition, behind the ATP Tour. The ITF World Tennis Tour tournaments are on the entry-level of international professional tennis competition. The ATP Challenger Tour is administered by the Association of Tennis Professionals. Players who succeed on the ATP Challenger Tour earn sufficient ranking points to become eligible for main draw or qualifying draw entry at ATP Tour tournaments. Players on the Challenger Tour are usually young players looking to advance their careers, those who fail to qualify for ATP events, or former ATP players looking to get back into the big tour.
The U.S. National Indoor Championships was a tennis tournament that was last held at the Racquet Club of Memphis in Memphis, Tennessee, United States. Also known as the U.S. International Indoor Championships. The event was played on indoor hard courts and usually took place in February. For much of its more than 100-year history it was a combined men's and women's tournament but in 2014, its final year, only a men's tournament was held. The event was previously known under various sponsored names including the Memphis Open, the Regions Morgan Keegan Championships, the Kroger St. Jude Championship, and the Volvo Championships. It was called throughout most of its history the National Indoor Championships.
Michael Craig Russell is an American former professional tennis player, and tennis coach. He reached a career-high singles ranking of World No. 60 in August 2007. His 23 United States Tennis Association (USTA) Pro Circuit singles titles were the all-time record, as of November 2013. That month he became the American No. 3.
Jeff "Salzy" Salzenstein is an American left-handed former professional tennis player. In 1986 he won the US Boys' 12 National Hard Court Tennis Singles Championship and Doubles Championship. His highest singles ranking was world No. 100 in June 2004, when he became the oldest American to break into the top 100 in men's tennis, at 30 years of age. His career-high in doubles was No. 68 in November 1997.
Wayne Odesnik is a South African-born American retired professional left-handed tennis player, with a two-handed backhand. His highest singles ranking was No. 77 in 2009.
Michael McClune is an American professional tennis player.
Scott Lipsky is an American former professional tennis player and coach. As a player, Lipsky was primarily a doubles specialist.
Jesse Witten is an American professional tennis player. He is a graduate of Lely High School and the University of Kentucky, where he majored in kinesiology.
The Tallahassee Tennis Challenger is a professional tennis tournament played on green clay courts. It is currently part of the Association of Tennis Professionals (ATP) Challenger Tour. It is held annually at the Forestmeadows Tennis Complex in Tallahassee, Florida in the United States, since 2000.
The Oaks Club Challenger is a tournament for professional female tennis players played on outdoor clay courts. The event is classified as a $25,000 ITF Women's Circuit tournament and has been held in Osprey, Florida, United States, since 2009.
Robert Rhyne Williams is a former American tennis player and current tennis coach. He played his last ATP match in 2018, and is coaching fellow collegiate player Dominik Koepfer, and Zachary Svajda.
David DiLucia is a former professional tennis player from the United States.
The Henderson Tennis Open is a tournament for professional female tennis players played on outdoor hard courts. The event is classified as a $60,000 ITF Women's Circuit tournament and also part of the USTA Pro Circuit calendar. It has been held in Las Vegas, United States, since 2009 and played at the Red Rock Country Club. It was previously played at the Darling Tennis Center, the former site of the ATP Tennis Channel Open.
Phillip Simmonds is a professional tennis player from the United States.
Opened in 1991 at a cost of $5.3 million, the Atkins Tennis Center is home to both men and women's tennis at the University of Illinois at Urbana-Champaign. The tennis center features six indoor courts and twenty outdoor courts. Additionally, the complex has a pro shop and court times for general public use. It also hosts elite junior tournaments and one of the longest running professional tournaments on the USTA Pro Circuit: the JSM Challenger. The facility includes the Khan Outdoor Tennis Complex.
Jarmere Jenkins is a retired American professional tennis player who became the hitting partner for Serena Williams. He was the 2013 Intercollegiate Tennis Association (ITA) National Player of the Year and male ACC Athlete of the Year after earning the national championships in indoor singles, outdoor doubles and team competition while also finishing runner up in outdoor singles. He was the first Atlantic Coast Conference athlete to win ACC athlete of the year solely for tennis accomplishments. In his first full year as a pro, he cracked the top 200 in the 2014 year end rankings at 193, but the costs of travel became prohibitive for him and he retired in 2017.
The Carson Challenger was a tournament for professional female and male tennis players. The event on outdoor hardcourts was classified as a $50,000 ITF Women's Circuit tournament and was held in Carson, California in the United States from 2007 to 2011. In 2014, the tournament was a replacement for the Yakima Regional Hospital Challenger, as their clubhouse was destroyed by a fire earlier in the year. The event was also previously part of the ATP Challenger Tour, from 2005 to 2010, with the exception of 2006.
The 2015 Australian Open wildcard playoffs and entries are a group of events and internal selections to choose the eight men and eight women singles wildcard entries for the 2015 Australian Open, as well as seven male and seven female doubles teams plus eight mixed doubles teams.
Reilly Opelka is an American professional tennis player. At 6 feet 11 inches tall, he is tied for the tallest-ever ATP-ranked player, and can produce serves that measure over 140 mph. He has been ranked as high as world No. 17 in singles by the ATP, which he achieved on February 28, 2022, and in doubles as world No. 89 on August 2, 2021. He has won four ATP singles titles and one doubles title. He is a junior Wimbledon champion.
The Tennessee Volunteer men's tennis team represents the University of Tennessee, in Knoxville, TN. The program has appeared in 31 NCAA Tournaments. Additionally, the Vols have won 9 SEC Championships, 4 SEC Tournaments, and finished as national runner-up three times. Prominent ATP players who came to Tennessee include Tennys Sandgren, John-Patrick Smith, Chris Woodruff, Paul Annacone, Michael Fancutt, and Mike De Palmer.
2023 Knoxville Challenger 
