# 2021 Christus Health Pro Challenge – Singles

Ann Li was the defending champion but chose to compete at the 2021 Courmayeur Ladies Open instead.
Misaki Doi won the title, defeating Harriet Dart in the final, 7–6$^{(7–5)}$, 6–2.

## Seeds

* Madison Brengle (quarterfinals)
* Claire Liu (quarterfinals)
* Beatriz Haddad Maia (semifinals)
* Misaki Doi (champion)
* Harriet Dart (final)
* Wang Xiyu (first round)
* Caty McNally (quarterfinals)
* Katarzyna Kawa (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 |
| | Marcela Zacarías | 5 | 0 | | | | | |
| 4 | Misaki Doi | 7 | 6 | | | | | |
| 4 | Misaki Doi | 7 | 6 | | 4 | Misaki Doi | 7$^7$ | 6 |
| | | | | | 5 | Harriet Dart | 6$^5$ | 2 |
| 3 | Beatriz Haddad Maia | 4 | 6 | 2 | 5 | Harriet Dart | 6$^5$ | 2 |
| 5 | Harriet Dart | 6 | 4 | 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 | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | M Brengle | 4 | 6 | 6 | | | | | | | | | | | | | |
| Q | A Sutjiadi | 6 | 1 | 0 | 1 | M Brengle | 6 | 6 | | | | | | | | | |
| | A Glatch | 7$^7$ | 6 | | | A Glatch | 2 | 4 | | | | | | | | | |
| WC | R Brantmeier | 6$^2$ | 0 | | | | | | | 1 | M Brengle | 4 | 3 | | | | |
| Q | W Osuigwe | 4 | 6 | 6 | | | | | | | M Zacarías | 6 | 6 | | | | |
| WC | M Mateas | 6 | 1 | 4 | Q | W Osuigwe | 3 | 6 | 5 | | | | | | | | |
| | M Zacarías | 6 | 7 | | | M Zacarías | 6 | 1 | 7 | | | | | | | | |
| 6 | Xiy Wang | 4 | 5 | | | | | | | | | | | | M Zacarías | 5 | 0 |
| 4 | M Doi | 6 | 3 | 6 | | | | | | | | | | 4 | M Doi | 7 | 6 |
| Q | S Chang | 4 | 6 | 3 | 4 | M Doi | 7 | 6 | | | | | | | | | |
| PR | N-l Han | 6 | 7 | | PR | N-l Han | 5 | 3 | | | | | | | | | |
| Q | E Douglas | 1 | 5 | | | | | | | 4 | M Doi | 6 | 6 | | | | |
| | G Min | 6 | 6 | | | | | | | 8 | K Kawa | 3 | 4 | | | | |
| Q | A Zhu | 4 | 3 | | | G Min | 0 | 3 | | | | | | | | | |
| Q | E Mandlik | 5 | 4 | | 8 | K Kawa | 6 | 6 | | | | | | | | | |
| 8 | K Kawa | 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 | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 7 | C McNally | 6 | 6 | | | | | | | | | | | | | | | |
| Q | A Krueger | 2 | 3 | | 7 | C McNally | 7 | 6 | | | | | | | | | | |
| | C Harrison | 6 | 6 | | | C Harrison | 5 | 3 | | | | | | | | | | |
| WC | A Smith | 4 | 2 | | | | | | | 7 | C McNally | 4 | 4 | | | | | |
| | C Perrin | 6$^2$ | 6 | 6 | | | | | | 3 | B Haddad Maia | 6 | 6 | | | | | |
| Q | K Kozarov | 7$^7$ | 2 | 3 | | C Perrin | 1 | 2 | | | | | | | | | | |
| WC | M Kononova | 1 | 1 | | 3 | B Haddad Maia | 6 | 6 | | | | | | | | | | |
| 3 | B Haddad Maia | 6 | 6 | | | | | | | | | | | 3 | B Haddad Maia | 4 | 6 | 2 |
| 5 | H Dart | 6 | 6$^5$ | 6 | | | | | | | | | | 5 | H Dart | 6 | 4 | 6 |
| | K Nara | 3 | 7$^7$ | 1 | 5 | H Dart | 6 | 6 | | | | | | | | | | |
| | H Baptiste | 2 | 2 | | | T Andrianjafitrimo | 1 | 2 | | | | | | | | | | |
| | T Andrianjafitrimo | 6 | 6 | | | | | | | 5 | H Dart | 6 | 6 | | | | | |
| | K Volynets | 6 | 7 | | | | | | | 2 | C Liu | 3 | 4 | | | | | |
| | P Plipuech | 0 | 5 | | | K Volynets | 4 | 6 | 1 | | | | | | | | | |
| | F Di Lorenzo | 6$^3$ | 1 | | 2 | C Liu | 6 | 1 | 6 | | | | | | | | | |
| 2 | C Liu | 7$^7$ | 6 | | | | | | | | | | | | | | | |