The 2013 Kazan Kremlin Cup was a professional tennis tournament played on indoor hard courts. It was the fourth edition of the tournament which was part of the 2013 ATP Challenger Tour. It took place in Kazan, Russia between 21 and 27 October 2013.
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
 Russian Federation | Evgeny Donskoy | 84 | 1 | |
| Russian Federation | Teymuraz Gabashvili | 105 | 2 | |
 Ukraine | Oleksandr Nedovyesov | 124 | 3 | |
 Kazakhstan | Andrey Golubev | 131 | 4 | |
 Italy | Matteo Viola | 132 | 5 | |
 Serbia | Dušan Lajović | 138 | 6 | |
| Matthias Bachinger | 146 | 7 | ||
 Moldova, Republic of | Radu Albot | 172 | 8 |
The following players received wildcards into the singles main draw:
Barış Ergüden Aslan Karatsev Timur Kiuamov Andrey RublevThe following players received entry from the qualifying draw:
The following players received entry as a lucky loser:
Alexander RumyantsevSee main article: 2013 Kazan Kremlin Cup – Singles.
Oleksandr Nedovyesov def. Andrey Golubev 6–4, 6–1See main article: 2013 Kazan Kremlin Cup – Doubles.
Radu Albot / 
Farrukh Dustov def. 
Egor Gerasimov / Dzmitry Zhyrmont 6–2, 6–7(3–7), [10–7]