# 2020 Monterrey Challenger – Singles

Alexander Bublik was the defending champion but chose not to defend his title.
Adrian Mannarino won the title after defeating Aleksandar Vukic 6–1, 6–3 in the final.

## Seeds

All seeds receive a bye into the second round.
* Adrian Mannarino (champion)
* Feliciano López (second round)
* Pablo Andújar (quarterfinals)
* Ričardas Berankis (third round)
* Federico Coria (second round)
* Jason Jung (quarterfinals)
* Paolo Lorenzi (third round)
* Federico Gaio (second round)
* Lorenzo Giustino (third round)
* Steven Diez (second round)
* Viktor Troicki (second round)
* Brayden Schnur (second round)
* Andrew Harris (third round)
* Peter Polansky (third round)
* Bernard Tomic (third round)
* Ernesto Escobedo (semifinals)

## 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

| Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| 1/WC | Adrian Mannarino | 6 | 6 | | | | | | | | | | |
| | John-Patrick Smith | 4 | 1 | | | | | | | | | | |
| | John-Patrick Smith | 4 | 1 | | 1/WC | Adrian Mannarino | 6 | 6 | | | | | |
| | | | | | | Ulises Blanch | 2 | 4 | | | | | |
| 3 | Pablo Andújar | 6 | 6$^4$ | 5 | | Ulises Blanch | 2 | 4 | | | | | |
| | Ulises Blanch | 3 | 7$^7$ | 7 | | | | | | | | | |
| | Ulises Blanch | 3 | 7$^7$ | 7 | | | | | | 1/WC | Adrian Mannarino | 6 | 6 |
| | | | | | | | | | | | Aleksandar Vukic | 1 | 3 |
| 6 | Jason Jung | 2 | 2 | | | | | | | | | | | Aleksandar Vukic | 1 | 3 |
| 16 | Ernesto Escobedo | 6 | 6 | | | | | | | | | | |
| 16 | Ernesto Escobedo | 6 | 6 | | 16 | Ernesto Escobedo | 7$^7$ | 6$^5$ | 6$^4$ | | | | |
| | | | | | | Aleksandar Vukic | 6$^3$ | 7$^7$ | 7$^7$ | | | | |
| | Kevin King | 0 | 3 | | | Aleksandar Vukic | 6$^3$ | 7$^7$ | 7$^7$ | | | | |
| | Aleksandar Vukic | 6 | 6 | | | | | | | | | | |

### Top half
#### Section 1

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| | | | | | 1/WC | A Mannarino | 6 | 6 | | | | | | | | | |
| | D Altmaier | 6 | 4 | 2 | | H Bourchier | 2 | 4 | | | | | | | | | |
| | H Bourchier | 2 | 6 | 6 | | | | | | 1/WC | A Mannarino | 6 | 6 | | | | |
| | TM Etcheverry | 4 | 4 | | | | | | | 14 | P Polansky | 1 | 2 | | | | |
| | E King | 6 | 6 | | | E King | 2 | 3 | | | | | | | | | |
| | | | | | 14 | P Polansky | 6 | 6 | | | | | | | | | |
| | | | | | | | | | | | | | | 1/WC | A Mannarino | 6 | 6 |
| | | | | | | | | | | | | | | | J-P Smith | 4 | 1 |
| | | | | | 10 | S Diez | 1 | 0 | | | | | | | | | |
| | J-P Smith | 6 | 6 | | | J-P Smith | 6 | 6 | | | | | | | | | |
| WC | Milledge Cossu | 1 | 0 | | | | | | | | J-P Smith | 7$^9$ | 6 | | | | |
| | GM Moroni | 6 | 3 | | | | | | | | GM Moroni | 6$^7$ | 1 | | | | |
| | M Purcell | 3 | 0$^r$ | | | GM Moroni | 6 | 6$^4$ | 6 | | | | | | | | |
| | | | | | 8 | F Gaio | 4 | 7$^7$ | 2 | | | | | | | | |

#### Section 2

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| | | | | | 3 | P Andújar | 6 | 6 | | | | | | | | | | | |
| | MF Descotte | 5 | 3 | | | D Young | 3 | 1 | | | | | | | | | | | |
| | D Young | 7 | 6 | | | | | | | 3 | P Andújar | 6 | 6 | | | | | | |
| Q | L Caruana | 1 | 6 | 6 | | | | | | 13 | A Harris | 2 | 2 | | | | | | |
| | A Velotti | 6 | 4 | 3 | Q | L Caruana | 3 | 1 | | | | | | | | | | | |
| | | | | | 13 | A Harris | 6 | 6 | | | | | | | | | | | |
| | | | | | | | | | | | | | | | 3 | P Andújar | 6 | 6$^4$ | 5 |
| | | | | | | | | | | | | | | | | U Blanch | 3 | 7$^7$ | 7 |
| | | | | | 11 | V Troicki | 6$^3$ | 6 | 3 | | | | | | | | | | |
| | U Blanch | 6 | 6 | | | U Blanch | 7$^7$ | 4 | 6 | | | | | | | | | | |
| Q | C Gómez-Herrera | 3 | 1 | | | | | | | | U Blanch | 6 | 5 | 6 | | | | | |
| | J Ward | 6 | 6 | | | | | | | 7 | P Lorenzi | 4 | 7 | 4 | | | | | |
| | G Blancaneaux | 4 | 2 | | | J Ward | 3 | 7$^7$ | 3 | | | | | | | | | | |
| | | | | | 7 | P Lorenzi | 6 | 6$^2$ | 6 | | | | | | | | | | |

### Bottom half
#### Section 3

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| | | | | | 6 | J Jung | 7$^7$ | 6$^6$ | 7$^8$ | | | | | | | | |
| | Oscar José Gutierrez | 3 | 4 | | | C Altamirano | 6$^2$ | 7$^8$ | 6$^6$ | | | | | | | | |
| | C Altamirano | 6 | 6 | | | | | | | 6 | J Jung | 6 | 6 | | | | |
| | O Luz | 6$^2$ | 6 | 5 | | | | | | 9 | L Giustino | 1 | 2 | | | | |
| | C Eubanks | 7$^7$ | 3 | 7 | | C Eubanks | 6 | 4 | 4 | | | | | | | | |
| | | | | | 9 | L Giustino | 3 | 6 | 6 | | | | | | | | |
| | | | | | | | | | | | | | | 6 | J Jung | 2 | 2 |
| | | | | | | | | | | | | | | 16 | E Escobedo | 6 | 6 |
| | | | | | 16 | E Escobedo | 6 | 6 | | | | | | | | | |
| | JP Ficovich | 6$^5$ | 3 | | | J Kubler | 1 | 2 | | | | | | | | | |
| | J Kubler | 7$^7$ | 6 | | | | | | | 16 | E Escobedo | 7$^7$ | 7$^7$ | | | | |
| WC | S Mochizuki | 6 | 4 | 6 | | | | | | 4 | R Berankis | 6$^5$ | 6$^5$ | | | | |
| WC | A Hernández | 3 | 6 | 2 | WC | S Mochizuki | 5 | 4 | | | | | | | | | |
| | | | | | 4 | R Berankis | 7 | 6 | | | | | | | | | |

#### Section 4

| First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals |
| | | | | 5 | F Coria | 1 | 7$^7$ | 6$^5$ | | | | | | | | |
| | N Mejía | 1 | 4 | | G Clezar | 6 | 6$^5$ | 7$^7$ | | | | | | | | |
| | G Clezar | 6 | 6 | | | | | | | G Clezar | 6$^4$ | 6 | 4 | | | |
| | K King | 6 | 6 | | | | | | | K King | 7$^7$ | 4 | 6 | | | |
| | G Oliveira | 1 | 2 | | K King | 6 | 6$^4$ | 7 | | | | | | | | |
| | | | | 12 | B Schnur | 4 | 7$^7$ | 5 | | | | | | | | |
| | | | | | | | | | | | | | | K King | 0 | 3 |
| | | | | | | | | | | | | | | A Vukic | 6 | 6 |
| | | | | 15 | B Tomic | 6 | 6$^2$ | 6 | | | | | | | | |
| WC | L Patiño | 0 | 4 | | A Menéndez Maceiras | 3 | 7$^7$ | 3 | | | | | | | | |
| | A Menéndez Maceiras | 6 | 6 | | | | | | 15 | B Tomic | 4 | 4 | | | | |
| | J Lenz | 3 | 3 | | | | | | | A Vukic | 6 | 6 | | | | |
| | A Vukic | 6 | 6 | | A Vukic | 6 | 3 | 6 | | | | | | | | |
| | | | | 2 | F López | 3 | 6 | 3 | | | | | | | | |