# 2013 U.S. Men's Clay Court Championships – Singles

Juan Mónaco was the defending champion, but lost to John Isner in the semifinals. Isner went on to win the title, defeating Nicolás Almagro in the final, 6–3, 7–5.

## Seeds

The top four seeds received a bye into the second round.
* Nicolás Almagro (final)
* Tommy Haas (second round)
* Juan Mónaco (semifinals)
* Sam Querrey (withdrew because of a right pectoral muscle strain)
* John Isner (champion)
* Fernando Verdasco (second round)
* Paolo Lorenzi (quarterfinals)
* Michael Russell (first round)

## Draw
### Key

* Q = Qualifier
* WC = Wild card
* LL = Lucky loser
* Alt = Alternate
* SE = Special exempt
* PR = Protected ranking
* ITF = ITF entry
* JE = Junior exempt
* w/o = Walkover
* r = Retired
* d = Defaulted
* SR = Special ranking

### Finals

| Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| 1 | Nicolás Almagro | 6 | 6 | | | | | |
| WC | Rhyne Williams | 2 | 1 | | | | | |
| WC | Rhyne Williams | 2 | 1 | | 1 | Nicolás Almagro | 3 | 5 |
| | | | | | 5 | John Isner | 6 | 7 |
| 3 | Juan Mónaco | 6 | 4 | 4 | 5 | John Isner | 6 | 7 |
| 5 | John Isner | 1 | 6 | 6 | | | | |

### Top half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| | | | | | 1 | N Almagro | 2 | 6 | 6 | | | | | | | | | |
| | G Monfils | 7$^7$ | 7 | | | G Monfils | 6 | 0 | 3 | | | | | | | | | |
| | J Blake | 6$^5$ | 5 | | | | | | | 1 | N Almagro | 6 | 6 | | | | | |
| | F Cipolla | 4 | 6 | 7 | | | | | | 7 | P Lorenzi | 4 | 4 | | | | | |
| Q | F Argüello | 6 | 4 | 5 | | F Cipolla | 6$^4$ | 1 | | | | | | | | | | |
| Q | G Melzer | 2 | 2 | | 7 | P Lorenzi | 7$^7$ | 6 | | | | | | | | | | |
| 7 | P Lorenzi | 6 | 6 | | | | | | | | | | | | 1 | N Almagro | 6 | 6 |
| | | | | | | | | | | | | | | | WC | R Williams | 2 | 1 |
| | | | | | LL | I Karlović | 4 | 7$^7$ | 6$^3$ | | | | | | | | | |
| WC | R Williams | 7 | 7 | | WC | R Williams | 6 | 6$^5$ | 7$^7$ | | | | | | | | | |
| | G Pella | 5 | 5 | | | | | | | WC | R Williams | 7$^7$ | 1 | 6 | | | | |
| PR | S Devvarman | 6$^5$ | 0 | | | | | | | | R Ramírez Hidalgo | 6$^1$ | 6 | 4 | | | | |
| | R Ramírez Hidalgo | 7$^7$ | 6 | | | R Ramírez Hidalgo | 6 | 6 | | | | | | | | | | |
| WC | S Johnson | 6$^5$ | 2 | | 6 | F Verdasco | 3 | 2 | | | | | | | | | | |
| 6 | F Verdasco | 7$^7$ | 6 | | | | | | | | | | | | | | | |

### Bottom half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 8 | M Russell | 2 | 2 | | | | | | | | | | | | | | | | |
| Q | R Ginepri | 6 | 6 | | Q | R Ginepri | 6 | 4 | 6 | | | | | | | | | | |
| | M Alund | 4 | 6 | 6 | | M Alund | 2 | 6 | 4 | | | | | | | | | | |
| | L Hewitt | 6 | 3 | 1 | | | | | | Q | R Ginepri | 1 | 0 | | | | | | |
| | J Ouanna | 1 | 2 | | | | | | | 3 | J Mónaco | 6 | 6 | | | | | | |
| | T Smyczek | 6 | 6 | | | T Smyczek | 6$^5$ | 1 | | | | | | | | | | | |
| | | | | | 3 | J Mónaco | 7$^7$ | 6 | | | | | | | | | | | |
| | | | | | | | | | | | | | | | 3 | J Mónaco | 6 | 4 | 4 |
| 5 | J Isner | 7$^7$ | 6 | | | | | | | | | | | | 5 | J Isner | 1 | 6 | 6 |
| | R Harrison | 6$^4$ | 4 | | 5 | J Isner | 7 | 6$^3$ | 7$^7$ | | | | | | | | | | |
| WC | J Sock | 7$^7$ | 6 | | WC | J Sock | 5 | 7$^7$ | 6$^3$ | | | | | | | | | | |
| Q | B Klahn | 6$^3$ | 3 | | | | | | | 5 | J Isner | 6 | 3 | 6 | | | | | |
| | R Berankis | 6$^3$ | 7 | 6 | | | | | | | R Berankis | 3 | 6 | 3 | | | | | |
| | J Levine | 7$^7$ | 5 | 4 | | R Berankis | 6 | 6 | | | | | | | | | | | |
| | | | | | 2 | T Haas | 3 | 3 | | | | | | | | | | | |

## Qualifying
### Seeds

The top five seeds receive a bye into the second round.
* Ivo Karlović (qualifying competition, lucky loser)
* Mischa Zverev (second round)
* Teymuraz Gabashvili (qualifying competition)
* Bradley Klahn (qualified)
* Peter Polansky (qualifying competition)
* Facundo Argüello (qualified)
* Michael Yani (first round, retired)
* Alex Kuznetsov (first round)

### Qualifiers

* Gerald Melzer
* Robby Ginepri
* Facundo Argüello
* Bradley Klahn

### Lucky losers

* Ivo Karlović

### Draw
#### First qualifier

| First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| | | | | 1 | Ivo Karlović | 6 | 6 | | | | | |
| William Boe-Wiegaard | William Boe-Wiegaard | 2 | 2 | | Florin Mergea | 4 | 3 | | | | | |
| Florin Mergea | Florin Mergea | 6 | 6 | | | | | | 1 | Ivo Karlović | 4 | 6$^3$ |
| Nicholas Edlefsen | Nicholas Edlefsen | 2 | 2 | | | | | | | Gerald Melzer | 6 | 7$^7$ |
| Roman Borvanov | Roman Borvanov | 6 | 6 | Roman Borvanov | Roman Borvanov | 7 | 6$^2$ | 1 | | | | |
| | Gerald Melzer | 6 | 6 | Gerald Melzer | Gerald Melzer | 5 | 7$^7$ | 6 | | | | |
| 8 | Alex Kuznetsov | 2 | 4 | | | | | | | | | |

#### Second qualifier

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| | | | | | 2 | Mischa Zverev | 2 | 6 | 2 | | | | |
| | Robby Ginepri | 6 | 6 | | | Robby Ginepri | 6 | 4 | 6 | | | | |
| WC | Bayo Philips | 2 | 0 | | | | | | | | Robby Ginepri | 7$^7$ | 7$^7$ |
| Michael Venus | Michael Venus | 5 | 6 | 4 | | | | | | 5 | Peter Polansky | 6$^5$ | 6$^3$ |
| Frank Moser | Frank Moser | 7 | 4 | 6 | | Frank Moser | 6$^4$ | 6$^4$ | | | | | |
| | | | | | 5 | Peter Polansky | 7$^7$ | 7$^7$ | | | | | |

#### Third qualifier

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| | | | | | 3 | Teymuraz Gabashvili | 6 | 7$^7$ | | | | |
| Takanyi Garanganga | Takanyi Garanganga | 6 | 5 | 7 | | Takanyi Garanganga | 2 | 6$^1$ | | | | |
| Scott Lipsky | Scott Lipsky | 4 | 7 | 5 | | | | | 3 | Teymuraz Gabashvili | 3 | 2 |
| Fritz Wolmarans | Fritz Wolmarans | 5 | 6 | 3 | | | | | 6 | Facundo Argüello | 6 | 6 |
| Chris Wettengel | Chris Wettengel | 7 | 1 | 6 | | Chris Wettengel | 3 | 2 | | | | |
| WC | David Warren | 2 | 3 | | 6 | Facundo Argüello | 6 | 6 | | | | |
| 6 | Facundo Argüello | 6 | 6 | | | | | | | | | |

#### Fourth qualifier

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| | | | | | 4 | Bradley Klahn | 7$^{11}$ | 6 | | | | |
| | Greg Ouellette | 6 | 6 | | | Greg Ouellette | 6$^9$ | 4 | | | | |
| WC | Connor Curry | 2 | 2 | | | | | | 4 | Bradley Klahn | 6 | 6 |
| Luka Gregorc | Luka Gregorc | 7 | 6 | | | | | | | Luka Gregorc | 1 | 4 |
| Vullnet Tashi | Vullnet Tashi | 5 | 1 | | Luka Gregorc | Luka Gregorc | 6 | 6 | | | | |
| | John Peers | 5 | 7 | 0 | John Peers | John Peers | 4 | 4 | | | | |
| 7 | Michael Yani | 7 | 5 | 0$^r$ | | | | | | | | |