| Date: | 30 April – 5 May |
| Edition: | 18th |
| Category: | WTA International |
| Draw: | 32S / 16D |
| Surface: | Clay / outdoor |
| Prize Money: | $250,000 |
| Location: | Rabat, Morocco |
| Venue: | Club des Cheminots[1] |
| Champs: |  Elise Mertens |
| Champd: |  Anna Blinkova /  Raluca Olaru |
| Main Name: | Morocco Open |
The 2018 Grand Prix SAR La Princesse Lalla Meryem was a women's professional tennis tournament played on clay courts. It was the 18th edition of the tournament and part of the WTA International tournaments category of the 2018 WTA Tour. It took place in Rabat, Morocco, between 30 April and 5 May 2018.
| Event | W | F | SF | QF | Round of 16 | Round of 32 | width=85 | Q | width=85 | Q3 | width=85 | Q2 | width=85 | Q1 |
| Women's singles | 280 | 180 | 110 | 60 | 30 | 1 | 18 | 14 | 10 | 1 | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Women's doubles | 1 |
| width=130 bgcolor=dfe2e9 | Event | width=80 bgcolor=lime | W | width=85 bgcolor=thistle | F | width=85 bgcolor=ffff00 | SF | width=85 bgcolor=ffebcd | QF | width=85 bgcolor=afeeee | Round of 16 | width=85 bgcolor=afeeee | Round of 32 | width=85 | Q3 | width=85 | Q2 | width=85 | Q1 |
| style=background:#ededed | Women's singles | $43,000 | $21,400 | $11,300 | $5,900 | $3,310 | $1,925 | $1,005 | $730 | $530 | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| style=background:#ededed | Women's doubles | $12,300 | $6,400 | $3,435 | $1,820 | $960 |
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
| Belgium | Elise Mertens | 17 | 1 | |
 Slovakia | Dominika Cibulková | 33 | 2 | |
| Petra Martić | 36 | 3 | ||
 Hungary | Tímea Babos | 38 | 4 | |
 Kazakhstan | Zarina Diyas | 52 | 6 | |
 Serbia | Aleksandra Krunić | 53 | 7 | |
| Hsieh Su-wei | 59 | 8 |
The following players received wildcards into the singles main draw:
The following players received entry using a protected ranking into the main draw:
The following players received entry from the qualifying draw:
The following player received entry as a lucky loser:
Magdalena Fręch
Catherine Bellis → replaced by Christina McHale
Kateryna Bondarenko → replaced by 
Sara Errani Kateryna Kozlova → replaced by Alexandra Dulgheru Kristína Kučová| Country | Player | Country | Player | Rank1 | Seed | |
|---|---|---|---|---|---|---|
 Czech Republic | Barbora Krejčíková |  United Kingdom | Anna Smith | 75 | 1 | |
| Poland | Alicja Rosolska | United States | Abigail Spears | 88 | 2 | |
| Monique Adamczak | Xenia Knoll | 122 | 3 | |||
 Georgia | Oksana Kalashnikova | Bibiane Schoofs | 155 | 4 |
The following pairs received wildcards into the doubles main draw:
Elise Mertens def. 
Ajla Tomljanović, 6–2, 7–6(7–4) Anna Blinkova / Raluca Olaru def. 
Georgina García Pérez / Fanny Stollár, 6–4, 6–4
