| 2015 Hoff Open | |
|---|---|
 | |
| Date | 8–14 June |
| Edition | 1st |
| Draw | 32S / 16D |
| Prize money | $50,000+H |
| Surface | Clay |
| Location | Moscow, Russia |
| Champions | |
| Singles | |
 Daniel Muñoz de la Nava | |
| Doubles | |
 Renzo Olivo / Horacio Zeballos | |
The 2015 Hoff Open was a professional tennis tournament played on clay courts. It was the first edition of the tournament which was part of the 2015 ATP Challenger Tour. It took place in Moscow, Russia between 8 and 14 June 2015.
| Country | Player | Rank1 | Seed |
|---|---|---|---|
| ESP | Marcel Granollers | 57 | 1 |
 RUS | Teymuraz Gabashvili | 74 | 2 |
 BIH | Damir Džumhur | 88 | 3 |
 SLO | Blaž Rola | 97 | 4 |
 MDA | Radu Albot | 130 | 5 |
| RUS | Alexander Kudryavtsev | 131 | 6 |
| ESP | Daniel Muñoz de la Nava | 134 | 7 |
| ARG | Horacio Zeballos | 142 | 8 |
The following players received wildcards into the singles main draw:
The following players received entry from the qualifying draw:
Patricio Heras Anton Zaitcev Mikhail Elgin 
Thiago Monteiro The following players received entry as a lucky loser into the main draw:
| Country | Player | Country | Player | Rank1 | Seed |
|---|---|---|---|---|---|
 BLR | Sergey Betov | RUS | Michail Elgin | 240 | 1 |
| MDA | Radu Albot | RUS | Alexander Kudryavtsev | 293 | 2 |
| BLR | Yaraslav Shyla | BLR | Andrei Vasilevski | 393 | 3 |
 LTU | Laurynas Grigelis |  ITA | Matteo Viola | 422 | 4 |
The following pairs received wildcards into the doubles main draw:
Daniel Muñoz de la Nava def. Radu Albot, 6–0, 6–1. Renzo Olivo / Horacio Zeballos def. 
Julio Peralta / 
Matt Seeberger, 7–5, 6–3.The 2016 Kazan Kremlin Cup was a professional tennis tournament played on hard courts. It was the seventh edition of the tournament which was part of the 2016 ATP Challenger Tour. It took place in Kazan, Russia between 14 and 20 March, 2016.
The 2016 Ricoh Open was a tennis tournament played on outdoor grass courts. It was the 27th edition of the Rosmalen Grass Court Championships, and part of the 250 Series of the 2016 ATP World Tour, and of the WTA International tournaments of the 2016 WTA Tour. Both the men's and the women's events took place at the Autotron park in Rosmalen, 's-Hertogenbosch in the Netherlands, from 6 June through 12 June 2016. Nicolas Mahut and Coco Vandeweghe won the singles titles.
The 2015 ATP Challenger China International – Nanchang was a professional tennis tournament played on hard courts. It was the second edition of the tournament which was part of the 2015 ATP Challenger Tour. It took place in Nanchang, China between 14 and 20 September 2015.
The 2016 WHB Hungarian Open was a professional tennis tournament played on hardcourt. It was the inaugural edition of the tournament and was part of the 2016 ATP Challenger Tour. It took place in Budapest, Hungary between 24 and 30 October 2016.
The 2017 Grand Prix Hassan II was a professional tennis tournament played on clay courts. It was the 33rd edition of the tournament and part of the 2017 ATP World Tour. It took place in Marrakesh, Morocco between 10 and 16 April 2017.
The 2017 Monte-Carlo Masters was a tennis tournament for male professional players, played from 16 April through 23 April 2017, on outdoor clay courts. It was the 111th edition of the annual Monte Carlo Masters tournament, sponsored by Rolex for the ninth time. It took place at the Monte Carlo Country Club in Roquebrune-Cap-Martin, France.
The 2017 Shymkent Challenger was a professional tennis tournament played on clay courts. It was the first edition of the tournament which was part of the 2017 ATP Challenger Tour. It took place in Shymkent, Kazakhstan between 22 and 27 May 2017.
The 2018 Kremlin Cup was a tennis tournament played on indoor hard courts. It was the 29th edition of the Kremlin Cup for the men and the 23rd edition for the women. The tournament was part of the ATP World Tour 250 Series of the 2018 ATP World Tour, and of the Premier Series of the 2018 WTA Tour. It was the last tournament for now to be held at the Olympic Stadium in Moscow, Russia, from 15 October through 21 October 2018.
The 2019 Chennai Open Challenger was a professional tennis tournament played on hard courts. It was the second edition of the tournament which was part of the 2019 ATP Challenger Tour. It took place in Chennai, India between 4 and 10 February 2019.
The 2019 Bangkok Challenger was a professional tennis tournament played on hard courts. It was the eleventh edition of the tournament and was part of the 2019 ATP Challenger Tour. It took place in Bangkok, Thailand between 11 and 17 February 2019.
The 2019 Pingshan Open was a professional tennis tournament played on outdoor hard courts. It was the sixth and fifth editions of the tournament which was part of the 2019 ATP Challenger Tour and the 2019 ITF Women's World Tennis Tour. It took place in Shenzhen, China between 11 and 17 March 2019.
The 2019 Guzzini Challenger was a professional tennis tournament played on hard courts. It was the seventeenth edition of the tournament which was part of the 2019 ATP Challenger Tour. It took place in Recanati, Italy between 1 and 7 July 2019.
The 2019 BNP Paribas Sopot Open is a professional tennis tournament played on clay courts. It will be the 2nd edition of the tournament which is part of the 2019 ATP Challenger Tour. It will take place in Sopot, Poland between 29 July and 4 August 2019.
The 2019 Internazionali di Tennis del Friuli Venezia Giulia was a professional tennis tournament played on clay courts. It was the sixteenth (men) and fourth (women) editions of the tournament which was part of the 2019 ATP Challenger Tour and the 2019 ITF Women's World Tennis Tour. It took place in Cordenons, Italy between 5 and 18 August 2019.
The 2019 Erste Bank Open was a men's tennis tournament played on indoor hard courts. It was the 45th edition of the event, and part of the ATP Tour 500 Series of the 2019 ATP Tour. It was held at the Wiener Stadthalle in Vienna, Austria, from 21 October until 27 October 2019.
The 2021 Saint Petersburg Challenger was a professional tennis tournament played on hard courts. It was the first edition of the tournament which was part of the 2021 ATP Challenger Tour. It took place in Saint Petersburg, Russia between 1 and 7 March 2021.
The 2021 Almaty Challenger was a professional tennis tournament played on clay courts. It was the fifth edition of the tournament which was part of the 2021 ATP Challenger Tour. It took place in Almaty, Kazakhstan between 7 and 13 June 2021.
The 2021 ATP Prague Open was a professional tennis tournament played on clay courts. It was part of the 2021 ATP Challenger Tour. It took place in Prague, Czech Republic between 9 and 15 August 2021.
The 2021 St. Petersburg Open was a tennis tournament played on indoor hard courts. It was the 26th edition of the St. Petersburg Open, and part of the ATP World Tour 250 Series of the 2021 ATP Tour. It took place at the Sibur Arena in Saint Petersburg, Russia, from October 25 through 31, 2021.
The 2021 Antalya Challenger IV was a professional tennis tournament played on clay courts. It was the fourth edition of the tournament which was part of the 2021 ATP Challenger Tour. It took place in Antalya, Turkey between 6 and 12 December 2021.