| Date: | 15 – 21 April |
| Edition: | 3rd |
| Draw: | 32S / 16D |
| Surface: | Clay |
| Prize Money: | $35,000+H |
| Location: | Santos, Brazil |
| Champs: | Gastão Elias |
| Champd: |  Pavol Červenák /  Matteo Viola |
The 2013 Campeonato Internacional de Tenis de Santos was a professional tennis tournament played on clay courts. It was the third edition of the tournament which was part of the 2013 ATP Challenger Tour. It took place in Santos, Brazil between 15 and 21 April 2013.
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
 Brazil | Rogério Dutra da Silva | 109 | 1 | |
| Brazil | João Souza | 111 | 2 | |
| Italy | Matteo Viola | 118 | 3 | |
| Gastão Elias | 133 | 4 | ||
| Antonio Veić | 146 | 5 | ||
| Paul Capdeville | 154 | 6 | ||
 Tunisia | Malek Jaziri | 166 | 7 | |
 Argentina | Guido Andreozzi | 168 | 8 |
The following players received wildcards into the singles main draw:
Ricardo Hocevar Caio Silva Júlio SilvaThe following players received entry as a special exempt into the singles main draw:
The following players received entry from the qualifying draw:
| Country | Player | Country | Player | Rank1 | Seed | |
|---|---|---|---|---|---|---|
| Nikola Mektić | Antonio Veić | 335 | 1 | |||
| Argentina | Guido Andreozzi | Ariel Behar | 567 | 2 | ||
| Brazil | Guilherme Clezar | Gastão Elias | 667 | 3 | ||
 Serbia | Boris Pašanski |  Bosnia and Herzegovina | Aldin Šetkić | 692 | 4 |
The following pairs received wildcards into the doubles main draw:
Rogério Dutra da Silva / Eduardo Russi Allan Gomes Oliveira / Caio Silva Wilson Leite / João SouzaSee main article: 2013 Campeonato Internacional de Tenis de Santos – Singles.
Rogério Dutra da Silva, 4–6, 6–2, 6–0See main article: 2013 Campeonato Internacional de Tenis de Santos – Doubles.
Pavol Červenák / Matteo Viola def. Guilherme Clezar / Gastão Elias, 6–2, 4–6, [10–6]
