The 2003 SEAT Open was a women's tennis tournament played on indoor hard courts in Kockelscheuer, Luxembourg which was part of Tier III of the 2003 WTA Tour. It was the 8th edition of the tournament and was held from 20 October until 26 October 2003. First-seeded Kim Clijsters won the singles title, her third consecutive at the event and fourth in total, and earned $35,000 first-prize money.
Finals
Singles
Kim Clijsters defeated Chanda Rubin, 6–2, 7–5
This was Clijsters' 8th singles title of the year and the 18th of her career.
Doubles
Maria Sharapova / Tamarine Tanasugarn defeated Elena Tatarkova / Marlene Weingärtner, 6–1, 6–4