The 1999 Sparkassen Cup singles was the tennis singles event of the tenth edition of the Sparkassen Cup; a WTA Tier II tournament held in Leipzig, Germany. Steffi Graf was the defending champion but retired after Wimbledon earlier in the year.
After losing in last year's final, Nathalie Tauziat won the title this year, defeating qualifier Květa Hrdličková, 6–1, 6–3.
The top four seeds received a bye to the second round.