# 2018 Chennai Open Challenger – Singles

This was the first edition of the tournament.
Jordan Thompson won the title after defeating Yuki Bhambri 7–5, 3–6, 7–5 in the final.

## Seeds

* Jordan Thompson (champion)
* Yuki Bhambri (final)
* Lee Duck-hee (semifinals)
* Mohamed Safwat (quarterfinals)
* Sumit Nagal (first round)
* Yasutaka Uchiyama (quarterfinals)
* Enrique López Pérez (second round, retired)
* Prajnesh Gunneswaran (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 | Final | Final | Final | Final | Final |
| 1 | Jordan Thompson | 6 | 7$^7$ | | | | | |
| | Pedro Martínez | 1 | 6$^5$ | | | | | |
| | Pedro Martínez | 1 | 6$^5$ | 1 | Jordan Thompson | 7 | 3 | 7 |
| | | | | 2 | Yuki Bhambri | 5 | 6 | 5 |
| 3 | Lee Duck-hee | 5 | 2 | 2 | Yuki Bhambri | 5 | 6 | 5 |
| 2 | Yuki Bhambri | 7 | 6 | | | | | |

### Top half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | J Thompson | 6 | 6 | | | | | | | | | | | | | |
| | K-M Maamoun | 4 | 2 | | 1 | J Thompson | 6 | 6 | | | | | | | | |
| | S Balaji | 4 | 6 | 5 | Q | W Trongcharoenchaikul | 3 | 2 | | | | | | | | |
| Q | W Trongcharoenchaikul | 6 | 3 | 7 | | | | | 1 | J Thompson | 6 | 3 | | | | |
| WC | Manish Sureshkumar | 4 | 2 | | | | | | | D Petrović | 4 | 0$^r$ | | | | |
| | D Petrović | 6 | 6 | | | D Petrović | 6 | 0 | | | | | | | | |
| | K Coppejans | 5 | 4 | | 7 | E López Pérez | 4 | 0$^r$ | | | | | | | | |
| 7 | E López Pérez | 7 | 6 | | | | | | | | | | 1 | J Thompson | 6 | 7$^7$ |
| 4 | M Safwat | 6 | 6 | | | | | | | | | | | P Martínez | 1 | 6$^5$ |
| | A Bega | 4 | 3 | | 4 | M Safwat | 6 | 6 | | | | | | | | |
| Q | A Kadhe | 6$^5$ | 6 | 6 | Q | A Kadhe | 4 | 2 | | | | | | | | |
| PR | S Myneni | 7$^7$ | 3 | 4 | | | | | 4 | M Safwat | 5 | 2 | | | | |
| | L Catarina | 6 | 6 | | | | | | | P Martínez | 7 | 6 | | | | |
| WC | Nitin Kumar Sinha | 3 | 4 | | | L Catarina | 6$^2$ | 0 | | | | | | | | |
| | P Martínez | 6 | 6 | | | P Martínez | 7$^7$ | 6 | | | | | | | | |
| 8 | P Gunneswaran | 1 | 4 | | | | | | | | | | | | | |

### Bottom half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 5 | S Nagal | 3 | 3 | | | | | | | | | | | | | | |
| | A Escoffier | 6 | 6 | | | A Escoffier | 7$^7$ | 6 | | | | | | | | | |
| | S Mukund | 3 | 2 | | | G Granollers | 6$^2$ | 2 | | | | | | | | | |
| | G Granollers | 6 | 6 | | | | | | | A Escoffier | 2 | 6 | 3 | | | | |
| | I Nedelko | 6 | 4$^r$ | | | | | | 3 | D-h Lee | 6 | 3 | 6 | | | | |
| Q | Abhinav Sanjeev Shanmugam | 3 | 5 | | Q | AS Shanmugam | 2 | 4 | | | | | | | | | |
| WC | VS Prashanth | 3 | 4 | | 3 | D-h Lee | 6 | 6 | | | | | | | | | |
| 3 | D-h Lee | 6 | 6 | | | | | | | | | | | 3 | D-h Lee | 5 | 2 |
| 6 | Y Uchiyama | 6 | 7$^7$ | | | | | | | | | | | 2 | Y Bhambri | 7 | 6 |
| | M Purcell | 1 | 6$^5$ | | 6 | Y Uchiyama | 6 | 7 | | | | | | | | | |
| | C İlkel | 4 | 7$^8$ | 6 | | C İlkel | 4 | 5 | | | | | | | | | |
| | D Popko | 6 | 6$^6$ | 2 | | | | | 6 | Y Uchiyama | 7 | 2 | 4 | | | | |
| WC | D Suresh | 2 | 0 | | | | | | 2 | Y Bhambri | 5 | 6 | 6 | | | | |
| Q | Sidharth Rawat | 6 | 6 | | Q | S Rawat | 2 | 3 | | | | | | | | | |
| | B Zapata Miralles | 1 | 6$^3$ | | 2 | Y Bhambri | 6 | 6 | | | | | | | | | |
| 2 | Y Bhambri | 6 | 7$^7$ | | | | | | | | | | | | | | |