1999 Mercedes-Benz Cup – Singles

Andre Agassi was the defending champion, but was defeated in the final to Pete Sampras with a score of 7–6(7–3), 7–6(7–1). By reaching the final, Sampras completed his 271st week at the world No. 1 ranking in his career, surpassing the previous record of 270 weeks established by Ivan Lendl.

Seeds
• # 🇺🇸 Andre Agassi (final)

• # 🇺🇸 Pete Sampras (champion)

• # 🇬🇧 Tim Henman (first round)

• # (n/a)

• # 🇸🇪 Thomas Enqvist (second round)

• # Goran Ivanišević (second round)

• # 🇦🇺 Lleyton Hewitt (quarterfinals, retired)

• # Wayne Ferreira (quarterfinals)