Janković's form tailed off following the US Open. At the Commonwealth Bank Tennis Classic in Bali, Janković was upset in the quarterfinals by former world No. 1, Lindsay Davenport, in Davenport's first singles tournament since giving birth. The following week at the China Open in Beijing, Janković defeated Davenport, but lost in the final to Hungarian teenager Ágnes Szávay, after Janković had a match point in the second set. Janković finished the year on a six-match losing streak, losing all three of her round-robin matches on her debut at the year-end WTA Tour Championships in Madrid. She finished the year ranked world No. 3. At the end of the year she had won 72 matches in a solar year, a true record of the WTA.
