The 2020 RBC Tennis Championships of Dallas was a professional tennis tournament played on hard courts. It was the 23rd edition of the tournament and part of the 2020 ATP Challenger Tour. It took place in Dallas, United States between 3 and 9 February 2020.
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
| Frances Tiafoe | 50 | 1 | ||
 Italy | Andreas Seppi | 85 | 2 | |
| Dominik Koepfer | 89 | 3 | ||
 Canada | Brayden Schnur | 103 | 4 | |
| Denis Kudla | 108 | 5 | ||
 Australia | Christopher O'Connell | 115 | 6 | |
| Jason Jung | 126 | 7 | ||
| Mackenzie McDonald | 129 | 8 | ||
| Bradley Klahn | 132 | 9 | ||
 Ecuador | Emilio Gómez | 148 | 10 | |
 Austria | Sebastian Ofner | 157 | 11 | |
| Mitchell Krueger | 164 | 12 | ||
 Uzbekistan | Denis Istomin | 170 | 13 | |
| Canada | Peter Polansky | 180 | 14 | |
| J. J. Wolf | 181 | 15 | ||
| Australia | Bernard Tomic | 183 | 16 |
The following players received wildcards into the singles main draw:
The following player received entry into the singles main draw as a special exempt:
The following players received entry from the qualifying draw:
See main article: 2020 RBC Tennis Championships of Dallas – Singles.
Jurij Rodionov def. 
Denis Kudla 7–5, 7–6(12–10).See main article: 2020 RBC Tennis Championships of Dallas – Doubles.
Dennis Novikov / Gonçalo Oliveira def. 
Luis David Martínez / 
Miguel Ángel Reyes-Varela 6–3, 6–4.