The 2013 PBZ Zagreb Indoors was an ATP tennis tournament played on hard courts indoors. It was the 11th overall edition of the PBZ Zagreb Indoors, and part of the ATP World Tour 250 series of the 2013 ATP World Tour. It took place in Zagreb, Croatia from February 2 through February 10, 2013.
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
| Marin Čilić[1] | 13 | 1 | ||
 Italy | ||||
 Russian Federation | Mikhail Youzhny | 27 | 3 | |
 Austria | Jürgen Melzer | 30 | 4 | |
 Slovakia | Martin Kližan[2] | 33 | 5 | |
 Cyprus | Marcos Baghdatis | 35 | 6 | |
| Grigor Dimitrov | 40 | 7 | ||
| Slovakia | Lukáš Lacko | 49 | 8 |
The following players received wildcards into the singles main draw:
The following players received entry from the qualifying draw:
The following players received entry as lucky losers:
Evgeny Donskoy
Łukasz Kubot (ankle injury)
Gilles Müller Andreas Seppi (fever) Lukáš Lacko (lower back injury)| Country | Player | Country | Player | Rank1 | Seed | |
|---|---|---|---|---|---|---|
 Sweden | Robert Lindstedt |  Romania | Horia Tecău | 17 | 1 | |
| Austria | Julian Knowle | Slovakia | Filip Polášek | 68 | 2 | |
 Mexico | Santiago González | Scott Lipsky | 68 | 3 | ||
| Austria | Jürgen Melzer | Philipp Petzschner | 75 | 4 |
The following pairs received wildcards into the doubles main draw:
Evgeny Donskoy Lukáš Lacko (lower back injury) Andreas Seppi (fever) Marcos Baghdatis (foot injury)See main article: 2013 PBZ Zagreb Indoors – Singles.
Jürgen Melzer, 6–3, 6–1See main article: 2013 PBZ Zagreb Indoors – Doubles.
Julian Knowle / Filip Polášek def. Ivan Dodig / Mate Pavić, 6–3, 6–3