| 2018 Reinert Open | |
|---|---|
| Date | 9–15 July |
| Edition | 11th |
| Category | ITF Women's Circuit |
| Prize money | $60,000 |
| Surface | Clay |
| Location | Versmold, Germany |
| Champions | |
| Singles | |
 Olga Danilović | |
| Doubles | |
 Pemra Özgen /  Despina Papamichail | |
The 2018 Reinert Open was a professional tennis tournament played on outdoor clay courts. It was the eleventh edition of the tournament and was part of the 2018 ITF Women's Circuit. It took place in Versmold, Germany, on 9–15 July 2018.
| Country | Player | Rank1 | Seed |
|---|---|---|---|
 GER
|
Carina Witthöft | 81 | 1 |
 NED
|
Richèl Hogenkamp | 161 | 2 |
 CZE
|
Tereza Martincová | 163 | 3 |
| CZE
|
Tereza Smitková | 168 | 4 |
 LIE
|
Kathinka von Deichmann | 169 | 5 |
| NED
|
Bibiane Schoofs | 173 | 6 |
 BUL
|
Elitsa Kostova | 183 | 7 |
| TUR
|
Çağla Büyükakçay | 186 | 8 |
The following players received a wildcard into the singles main draw:
The following players received entry from the qualifying draw:
Olga Danilović def. Laura Siegemund, 5–7, 6–1, 6–3 Pemra Özgen / Despina Papamichail def. Olga Danilović / Nina Stojanović, 1–6, 6–2, [10–4]
