text: Petrova Upsets Defending U.S. Open Champ (AP) AP - Justine Henin-Hardenne lost her U.S. Open title and her No. 1 ranking Monday night. The defending champion was upset by Nadia Petrova 6-3, 6-2 Monday night in the fourth round, the earliest the Open's top-seeded woman has lost since Billie Jean King went out in the third round in 1973.