Revenge will again be in the air when the top seed meets Henin in a semi-final grudge rematch on Thursday.
The victory earned the Belgian a place in the final of the German Open.
The duo meet in the semi-finals of the German Open.
Lindsay Davenport and Jennifer Capriati will clash for a place in the final of the Bausch and Lomb championships.
Serena was beaten by Jennifer Capriati while Venus lost to Russia's Anastasia Myskina in the women's quarter-finals at the French Open.
Jennifer Capriati stunned top seed Serena Williams 6-4, 6-4 in the semi-final of the Rome Masters.
The American registered a comfortable 6-2, 6-1 win over Maria Vento-Kabchi in the second round of the Rome Masters.
The sixth seed American won 5-7, 6-4, 6-1 to move into the quarter-finals of the German Open.
Former world number ones Lleyton Hewitt and Jennifer Capriati were also shown the exit door in the Nasdaq 100 Open.\n\n
The world number one overcame Nathalie Dechy, while Jennifer Capriati beat Silvia Farina Elia at the Qatar Open.
Capriati has won nearly $7 million in prize money but says she has no plans to relax for the rest of her career.
The second seed was treated by medical staff after cramping during \n\nher semi-final win over Jennifer Capriati.
Despite not having won a tournament since last year's Australian Open, world number seven Jennifer Capriati still believes she has the game to compete with the tour's best.\n
Venus worde down Lindsay Davenport while Clijsters rallied to beat Silvia Farina Elia in women's quarter-final matches.
Naomi Osaka has sacked her second coach in seven months, splitting with Jermaine Jenkins
U.S. captain Billie Jean King called up the big guns for the tie against the Czech Republic.
Tournament officials\n\nwere concerned about American tennis star Jennifer Capriati's\n\nmusic selection as she walked on the court before her match at\n\nthe WTA Masters Series event on Monday.
Capriati, playing her first match of the year after receiving a first-round bye, blew a one-set lead in going down to Tatiana Panova in the second round of the Sydney International
By losing, Ostapenko joins a ignominious group including, as well as Myskina, Steffi Graf, Jennifer Capriati, Svetlana Kuznetsova and Angelique Kerber who all lost as Grand Slam champions on the first run of their defences.
Petra Kvitova takes on Naomi Osaka in Saturday's Australian Open final with one of them set to emerge as a fresh champion at Melbourne Park as well as the new world number one.
However, Jelena Dokic was upset by qualifier Maria Vento-Kabchi in the Bank of the West Classic.
The Belgian rallied from the brink of defeat to beat Amelie Mauresmo in the final of the Romes Masters.
Prosecutors in Florida dropped charges of battery and stalking against Jennifer Capriati on Monday after the retired tennis player completed community service and an anger management class.
Summary of sports events and persons who made news on Sunday
Following Iga Swiatek's victory over Coco Gauff in the final, here's a list of French Open women's singles champions:
After stunning Venus Williams then saving two match points en route to beating Polona Hercog last week, Gauff was suddenly the hottest ticket in town but she was always going to find it tough against Halep, last year's French Open champion and the first top-10 opponent she had ever faced.