| 2020 Thindown Challenger Biella | |
|---|---|
| Date | 28 September – 4 October 2020 |
| Edition | 13th |
| Surface | Clay |
| Location | Biella, Italy |
| Champions | |
| Singles | |
 Facundo Bagnis | |
| Doubles | |
 Harri Heliövaara /  Szymon Walków | |
The 2020 Thindown Challenger Biella was a professional tennis tournament played on outdoor red clay courts. It was part of the 2020 ATP Challenger Tour. It took place in Biella, Italy between 28 September and 4 October 2020.
| Country | Player | Rank1 | Seed |
|---|---|---|---|
 BRA | Thiago Seyboth Wild | 107 | 1 |
 AUS | Christopher O'Connell | 112 | 2 |
 IND | Sumit Nagal | 127 | 3 |
| ARG | Facundo Bagnis | 129 | 4 |
 ITA | Paolo Lorenzi | 130 | 5 |
| ITA | Federico Gaio | 132 | 6 |
| IND | Prajnesh Gunneswaran | 141 | 7 |
 PER | Juan Pablo Varillas | 142 | 8 |
The following players received wildcards into the singles main draw:
Rémy Bertola Gabriele Felline Stefano Napolitano The following player received entry into the singles main draw using a protected ranking:
The following players received entry from the qualifying draw:
Facundo Bagnis def. 
Blaž Kavčič 6–7(4–7), 6–4, 0–0 ret. Harri Heliövaara / Szymon Walków def. 
Lloyd Glasspool / 
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