title: 2021 Knoxville Challenger
text: # 2021 Knoxville Challenger
  
  The 2021 Knoxville Challenger was a professional tennis tournament played on indoor hard courts. It was the seventeenth edition of the tournament which was part of the 2021 ATP Challenger Tour. It took place in Knoxville, United States between 8 and 14 November 2021.
  
  ## Singles main-draw entrants
  
  ### Seeds
  
  | Country | Player | $Rank^1$ | Seed |
  | - | - | - | - |
  | USA | Tennys Sandgren | 93 | 1 |
  | GER | Daniel Altmaier | 106 | 2 |
  | CAN | Vasek Pospisil | 113 | 3 |
  | USA | Mitchell Krueger | 148 | 4 |
  | USA | Jack Sock | 153 | 5 |
  | USA | J. J. Wolf | 159 | 6 |
  | KAZ | Dmitry Popko | 171 | 7 |
  | USA | Bjorn Fratangelo | 172 | 8 |
  
  * $^1$ Rankings are as of November 1, 2021.
  
  ### Other entrants
  
  The following players received wildcards into the singles main draw:
  
  * Aleksandar Kovacevic
  * Emilio Nava
  * Adam Walton
  
  The following player received entry into the singles main draw using a protected ranking:
  
  * Tatsuma Ito
  
  The following players received entry into the singles main draw as alternates:
  
  * Christian Harrison
  * Malek Jaziri
  * Peter Polansky
  
  The following players received entry from the qualifying draw:
  
  * JC Aragone
  * Gijs Brouwer
  * Aidan McHugh
  * Donald Young
  
  ## Champions
  
  ### Singles
  
  * Christopher Eubanks def. Daniel Altmaier 6–3, 6–4.
  
  ### Doubles
  
  * Malek Jaziri / Blaž Rola def. Hans Hach Verdugo / Miguel Ángel Reyes-Varela 3–6, 6–3, [10–5].
  