1999 Advanta Championships of Philadelphia – Singles

The 1999 Advanta Championships of Philadelphia singles was the tennis singles event of the seventeenth edition of the Advanta Championships of Philadelphia; a WTA Tier II tournament held in Philadelphia. Steffi Graf was the defending champion but retired after Wimbledon earlier in the year.

After losing in last year's final, World No. 2 Lindsay Davenport won the title this year, defeating World No. 1 Martina Hingis, 6–3, 6–4.

Seeds
The top four seeds received a bye to the second round.

• # Martina Hingis (final)

• # 🇺🇸 Lindsay Davenport (champion)

• # 🇺🇸 Venus Williams (semifinals)

• # 🇫🇷 Nathalie Tauziat (semifinals)

• # 🇫🇷 Julie Halard-Decugis (quarterfinals)

• # Amanda Coetzer (quarterfinals)

• # 🇧🇪 Dominique Van Roost (second round)

• # 🇷🇺 Anna Kournikova (first round)

Seeds
• # 🇨🇦 Maureen Drake (first round)

• # Emmanuelle Gagliardi (first round)

• # 🇺🇸 Lilia Osterloh (first round)

• # Seda Noorlander (qualifying competition, lucky loser)

• # replaced by 🇨🇦 Aneta Soukup (first round)

• # 🇺🇸 Jolene Watanabe (first round)

• # 🇧🇬 Pavlina Stoyanova (qualifying competition)

• # 🇺🇸 Samantha Reeves (second round)

Qualifiers
• # 🇺🇸 Jill Craybas

• # 🇺🇸 Marissa Irvin

• # 🇻🇪 María Vento

• # 🇨🇿 Dája Bedáňová

Lucky losers
• # Seda Noorlander