| WTA Nurnberg | 05/23 11:50 | 26 |
[99] Madison Brengle
v
Sorana Cirstea [45] 
|
3-6,6-3,3-6 | |
| WTA Nurnberg | 05/22 12:50 | 25 |
[107] Andrea Petkovic
v
Sorana Cirstea [45]
|
6-2,6-7,6-7 | |
| WTA Rome | 05/15 12:30 | 24 |
[47] Danielle Collins
v
Sorana Cirstea [43]
|
6-3,4-6,6-4 | |
| WTA Madrid | 05/08 13:30 | 25 |
[36] Sorana Cirstea v
Daria Kasatkina
[15] 
|
3-6,1-6 | |
| WTA Madrid | 05/06 09:00 | 24 |
[35] Sorana Cirstea v
Katerina Siniakova
[51] 
|
6-4,2-6,6-4 | |
| WTA Istanbul | 04/24 09:00 | 25 |
[83] Yulia Putintseva
v
Sorana Cirstea [34]
|
0-6,6-1,6-0 | |
| WTA Miami | 03/22 21:25 | 24 |
[33] Sorana Cirstea v
Su-Wei Hsieh
[61] |
5-7,2-6 | |
| WTA Indian Wells | 03/10 21:10 | 24 |
Venus Williams
v
Sorana Cirstea
|
6-3,6-4 | |
| WTA Indian Wells | 03/08 19:00 | 23 |
Monica Niculescu
v
Sorana Cirstea
|
2-6,3-6 | |
| Tie Break Tens Women | 03/06 01:48 | - |
Sorana Cirstea v
Shuai Zhang
|
6-1,1-6,0-0 | |
| WTA Budapest | 02/20 12:35 | 25 |
Viktoria Kuzmova
v
Sorana Cirstea
|
6-4,6-2 | |
| WTA Doha | 02/15 11:00 | 26 |
Sorana Cirstea v
Garbine Muguruza
|
0-6,4-6 | |
| WTA Doha | 02/14 14:00 | 25 |
Elise Mertens
v
Sorana Cirstea
|
5-7,4-6 | |
| WTA Doha | 02/13 13:55 | 24 |
Maria Sakkari
v
Sorana Cirstea
|
2-6,3-6 | |
| 2018 Fed Cup | 02/11 11:45 | 27 |
Sorana Cirstea v
Bianca Andreescu
|
Cancelled | |
| 2018 Fed Cup | 02/10 11:00 | 27 |
Sorana Cirstea v
Carol Zhao
|
6-2,6-2 | |
| WTA St. Petersburg | 01/30 17:35 | 25 |
Sorana Cirstea v
Dominika Cibulkova
|
5-7,2-6 | |
| Australian Open Women | 01/18 03:00 | 24 |
Lucie Safarova
v
Sorana Cirstea
|
6-2,6-4 | |
| Australian Open Women | 01/16 02:10 | 23 |
Sorana Cirstea v
Zarina Diyas
|
5-7,6-4,6-3 | |
| WTA Hobart | 01/08 03:35 | 25 |
Heather Watson
v
Sorana Cirstea
|
7-5,6-3 | |
| WTA Brisbane | 01/02 04:50 | 26 |
Sorana Cirstea v
Anastasija Sevastova
|
2-6,1-6 | |
| WTA Brisbane | 01/01 02:25 | 25 |
Jennifer Brady
v
Sorana Cirstea
|
6-7,1-6 | |
| WTA Luxembourg | 10/16 13:30 | 25 |
Veronica Cepede Royg
v
Sorana Cirstea
|
Retired | |
| WTA Linz | 10/13 18:00 | 27 |
[28] Magdalena Rybarikova
v
Sorana Cirstea [37]
|
5-7,6-2,6-1 | |
| WTA Linz | 10/12 18:30 | 26 |
Natalia Vikhlyantseva
v
Sorana Cirstea
|
6-7,4-6 | |
| WTA Linz | 10/11 10:00 | 25 |
[85] Alison Van Uytvanck
v
Sorana Cirstea [37]
|
3-6,5-7 | |
| WTA Beijing | 10/06 07:20 | 27 |
[8] Jelena Ostapenko
v
Sorana Cirstea [44]
|
6-4,6-4 | |
| WTA Beijing | 10/05 04:30 | 26 |
[44] Sorana Cirstea v
Karolina Pliskova
[4] |
6-1,7-5 | |
| WTA Beijing | 10/03 09:15 | 25 |
[71] Christina McHale
v
Sorana Cirstea [44]
|
6-7,0-6 | |
| WTA Beijing | 09/30 08:20 | 24 |
[49] Mona Barthel
v
Sorana Cirstea [46]
|
6-7,1-6 |