# 2015 Comerica Bank Challenger – Singles

Marcos Baghdatis was the defending champion but chose not to compete.
John Millman won the tournament, defeating Austin Krajicek in the final, 7–5, 2–6, 6–3.

## Seeds

* John Millman (champion)
* Malek Jaziri (quarterfinals)
* Kyle Edmund (semifinals)
* Bjorn Fratangelo (semifinals)
* Taro Daniel (quarterfinals)
* Matthew Ebden (quarterfinals)
* Austin Krajicek (final)
* Yoshihito Nishioka (quarterfinals)

## 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 | Final |
| 1 | John Millman | 3 | 6 | 7 | | | | | |
| 3 | Kyle Edmund | 6 | 4 | 5 | | | | | |
| 3 | Kyle Edmund | 6 | 4 | 5 | 1 | John Millman | 7 | 2 | 6 |
| | | | | | 7 | Austin Krajicek | 5 | 6 | 3 |
| 4 | Bjorn Fratangelo | 3 | 6$^2$ | | 7 | Austin Krajicek | 5 | 6 | 3 |
| 7 | Austin Krajicek | 6 | 7$^7$ | | | | | | |

### 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 | Semifinals |
| 1 | J Millman | 6 | 6 | | | | | | | | | | | | | | | | |
| Alt | A Sarkissian | 2 | 0 | | 1 | J Millman | 6 | 6 | | | | | | | | | | | |
| | B Klein | 4 | 4 | | | G Andreozzi | 3 | 2 | | | | | | | | | | | |
| | G Andreozzi | 6 | 6 | | | | | | | 1 | J Millman | 6 | 6 | | | | | | |
| | F Dustov | 1 | 6 | 6 | | | | | | 5 | T Daniel | 1 | 3 | | | | | | |
| Q | T Sandgren | 6 | 2 | 1 | | F Dustov | 7$^7$ | 5 | 0 | | | | | | | | | | |
| Q | Z Zhang | 6$^6$ | 2 | | 5 | T Daniel | 6$^5$ | 7 | 6 | | | | | | | | | | |
| 5 | T Daniel | 7$^8$ | 6 | | | | | | | | | | | | 1 | J Millman | 3 | 6 | 7 |
| 3 | K Edmund | 6 | 6 | | | | | | | | | | | | 3 | K Edmund | 6 | 4 | 5 |
| LL | T Niki | 1 | 2 | | 3 | K Edmund | 7 | 6 | | | | | | | | | | | |
| | J Zopp | 4 | 4 | | Q | D Nguyen | 5 | 3 | | | | | | | | | | | |
| Q | D Nguyen | 6 | 6 | | | | | | | 3 | K Edmund | 3 | 6 | 6 | | | | | |
| WC | J Donaldson | 7$^7$ | 6 | | | | | | | 8 | Y Nishioka | 6 | 3 | 3 | | | | | |
| | G Elias | 6$^2$ | 3 | | WC | J Donaldson | 6 | 3 | 3 | | | | | | | | | | |
| WC | M Krueger | 3 | 6 | 3 | 8 | Y Nishioka | 4 | 6 | 6 | | | | | | | | | | |
| 8 | Y Nishioka | 6 | 1 | 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 | Semifinals | Semifinals | Semifinals | Semifinals |
| 6 | M Ebden | 7$^7$ | 6 | | | | | | | | | | | | | | |
| | L Broady | 6$^4$ | 3 | | 6 | M Ebden | 2 | 7$^7$ | 6 | | | | | | | | |
| WC | T Haas | 6 | 6 | | WC | T Haas | 6 | 6$^5$ | 4 | | | | | | | | |
| | A Rublev | 4 | 3 | | | | | | | 6 | M Ebden | 4 | 2 | | | | |
| | Y Bhambri | 2 | 2 | | | | | | | 4 | B Fratangelo | 6 | 6 | | | | |
| | E Ymer | 6 | 6 | | | E Ymer | 3 | 4 | | | | | | | | | |
| | M Copil | 6 | 5 | 2 | 4 | B Fratangelo | 6 | 6 | | | | | | | | | |
| 4 | B Fratangelo | 3 | 7 | 6 | | | | | | | | | | 4 | B Fratangelo | 3 | 6$^2$ |
| 7 | A Krajicek | 6$^4$ | 6 | 7$^9$ | | | | | | | | | | 7 | A Krajicek | 6 | 7$^7$ |
| Alt | D Novikov | 7$^7$ | 4 | 6$^7$ | 7 | A Krajicek | 6 | 6 | | | | | | | | | |
| Q | M Zverev | 6$^1$ | 7 | 6 | Q | M Zverev | 3 | 4 | | | | | | | | | |
| WC | TH Fritz | 7$^7$ | 5 | 3 | | | | | | 7 | A Krajicek | 6 | 6 | | | | |
| | G Clezar | 6 | 1 | 6 | | | | | | 2 | M Jaziri | 3 | 4 | | | | |
| | S Devvarman | 2 | 6 | 3 | | G Clezar | 3 | 6 | 3 | | | | | | | | |
| | K Khachanov | 3 | 1 | | 2 | M Jaziri | 6 | 3 | 6 | | | | | | | | |
| 2 | M Jaziri | 6 | 6 | | | | | | | | | | | | | | |