See main article: 2014 Porsche Tennis Grand Prix.
Two-time defending champion Maria Sharapova defeated Ana Ivanovic in the final, 3–6, 6–4, 6–1 to win the singles tennis title at the 2014 Stuttgart Open.
The top four seeds receive a bye into the second round.
See also: 1. 
Agnieszka Radwańska (quarterfinals)
See also: 2. 
Simona Halep (second round)
See also: 3. 
Petra Kvitová (second round)
See also: 4. Angelique Kerber (second round)
See also: 5. 
Jelena Janković (semifinals)
See also: 6. 
Maria Sharapova (champion)
See also: 7. 
Dominika Cibulková (withdrew because of an Achilles injury)
See also: 8. 
Sara Errani (semifinals)
See also: 9. Ana Ivanovic (final)