The 2003 Adidas International was a combined men's and women's tennis tournament played on outdoor hard courts at the NSW Tennis Centre in Sydney in Australia that was part of the International Series of the 2003 ATP Tour and of Tier II of the 2003 WTA Tour. The tournament ran from 5 through 12 January 2003. Lee Hyung-taik and Kim Clijsters won the singles titles.

Finals

Men's singles

🇰🇷 Lee Hyung-taik defeated 🇪🇸 Juan Carlos Ferrero 4–6, 7–6(8–6), 7–6(7–4)

Women's singles

🇧🇪 Kim Clijsters defeated 🇺🇸 Lindsay Davenport 6–4, 6–3

Men's doubles

🇦🇺 Paul Hanley / 🇦🇺 Nathan Healey defeated 🇮🇳 Mahesh Bhupathi / 🇦🇺 Joshua Eagle 7–6(7–3), 6–4

Women's doubles

🇧🇪 Kim Clijsters / 🇯🇵 Ai Sugiyama defeated 🇪🇸 Conchita Martínez / 🇦🇺 Rennae Stubbs 6–3, 6–3