The ATP Tour is a worldwide top-tier tennis tour for men organized by the Association of Tennis Professionals. The second-tier tour is the ATP Challenger Tour and the third-tier is ITF Men's World Tennis Tour. The equivalent women's organisation is the WTA Tour.
The Sparkassen Open, known as Nord/LB Open until 2010, is a professional tennis tournament played on outdoor red clay courts. It is currently part of the Association of Tennis Professionals (ATP) Challenger Tour. It is held annually at the Braunschweiger Tennis- und Hockey Club in Braunschweig, Germany, since 1994.
Marcelo Fedrizzi Demoliner is a Brazilian professional tennis player. A doubles specialist, he won his first title at the ATP 250 Antalya Open in June 2018, after having reached 6 finals at that level. Runner-up at the ATP 500 Vienna in 2018 and Saint Petersburg in 2020. Alongside Maria José Martinez Sanchez, he was mixed doubles semifinalist in 2017 Wimbledon Championships and 2018 Australian Open. He reached a career high ranking of world number 34 in doubles in November 2017.
The Emami Kolkata Open ATP Challenger Tour is a professional tennis tournament played on outdoor hard courts. It is currently part of the Association of Tennis Professionals (ATP) Challenger Tour. It is held annually at the Bengal Tennis Association Stadium in Kolkata, India since 2014.
Félix Auger-Aliassime is a Canadian professional tennis player. He is the third-youngest player ranked in the top 20 by the Association of Tennis Professionals (ATP), and has a career-high singles ranking of No. 9, which he achieved on 10 January 2022, and doubles ranking of No. 60, attained on 1 November 2021. He has one singles title and one doubles title on the ATP Tour.
The Columbus Challenger is a professional tennis tournament played on hard courts. It is currently part of the Association of Tennis Professionals (ATP) Challenger Tour and WTA 125K series. The ATP event is held annually in Columbus, Ohio, U.S.A, as it has been since 2015, the tournament's start. The women's edition started in 2021.
The Monterrey Challenger is a professional tennis tournament played on hard courts. It is currently part of the Association of Tennis Professionals (ATP) Challenger Tour. It is held annually in Monterrey, Mexico since 2015.
Federico Coria is an Argentine tennis player. He has a career-high ATP singles ranking of No. 61 achieved on 23 August 2021. He also has a career-high doubles ranking of No. 243 achieved on 24 May 2021. Coria has won one ATP Challenger doubles title at the 2016 Campeonato Internacional de Tênis de Campinas and two ATP Challenger singles titles at the 2019 Savannah Challenger and at the 2021 Czech Open.
The Hungarian Challenger Open is a professional tennis tournament played on hard courts. It is currently part of the Association of Tennis Professionals (ATP) Challenger Tour. It is held annually in Budapest, Hungary since 2016.
The Koblenz Open is a professional tennis tournament played on indoor hard courts. It is currently part of the Association of Tennis Professionals (ATP) Challenger Tour. It is held annually in Koblenz, Germany since 2017.
The Kunal Patel San Francisco Open is a professional tennis tournament played on indoor hard courts. It is currently part of the Association of Tennis Professionals (ATP) Challenger Tour. It is held annually in San Francisco, United States since 2017. The inaugural event was held February 2017, at the Bay Club SF Tennis Center, the West Coast's largest indoor tennis facility.
The Bengaluru Open is a professional tennis tournament played on hard courts. It is currently part of the Association of Tennis Professionals (ATP) Challenger Tour. It is held annually in Bangalore, India since 2015.
The Marbella Tennis Open is a professional tennis tournament played on clay courts. It is currently part of the Association of Tennis Professionals (ATP) Challenger Tour. It will be held annually in Marbella, Spain, from 2018.
The 2019 ATP Tour was the global elite men's professional tennis circuit organised by the Association of Tennis Professionals (ATP) for the 2019 tennis season. The 2019 ATP Tour calendar comprised the Grand Slam tournaments, the ATP Tour Masters 1000, the ATP Finals, the ATP Tour 500 series, the ATP Tour 250 series and Davis Cup. Also included in the 2019 calendar were the Hopman Cup, the Laver Cup and the Next Gen ATP Finals which do not distribute ranking points. For the Masters series events the ATP introduced a shot clock. Players had a minute to come on court, 5 minutes to warmup, and then a minute to commence play, as well as 25 seconds between points.
The Da Nang Tennis Open is a professional tennis tournament played on hard courts. It is currently part of the Association of Tennis Professionals (ATP) Challenger Tour. It is held annually in Da Nang, Vietnam since 2019.
The Jerusalem Volvo Open is a professional tennis tournament played on hard courts. It is currently part of the Association of Tennis Professionals (ATP) Challenger Tour. It is held annually in Jerusalem since 2019.
The Bratislava Open is a professional tennis tournament played on clay courts.
The Emilia-Romagna Open is a professional tennis tournament played on clay courts. It is currently part of the Association of Tennis Professionals (ATP) Challenger Tour for men, and the WTA Tour for women. It is held annually in Montechiarugolo, Parma, Italy since 2019 and 2021.
The Potchefstroom Open is a professional tennis tournament played on hard courts. It is currently part of the Association of Tennis Professionals (ATP) Challenger Tour. It is held annually in Potchefstroom, South Africa since 2020.
The 2022 ATP Tour is the global elite men's professional tennis circuit organised by the Association of Tennis Professionals (ATP) for the 2022 tennis season. The 2022 ATP Tour calendar comprises the Grand Slam tournaments, the ATP Finals, the ATP Tour Masters 1000, the ATP Cup, the ATP 500 series and the ATP 250 series. Also included in the 2022 calendar are the Davis Cup, Next Gen ATP Finals, and Laver Cup, none of which distribute ranking points.
2016 STRABAG Challenger Open 
