ROTTERDAM, Netherlands (AP) Top-seeded Novak Djokovic had a winning return to the court when he advanced to the second round of the ABN Amro as Sergiy Stakhovsky of Ukraine retired with a leg injury on Tuesday.
Djokovic was leading 6-2, 4-1 at the time.
The Serb was making his first tour appearance since losing in the Australian Open quarterfinals.
PARIS (AP) Melanie Oudin of the United States beat Sorana Cirstea of Romania 6-3, 6-0 on Tuesday to reach the Open GDF Suez's second round.
Oudin, a U.S. Open quarterfinalist last year, next plays Patty Schnyder of Switzerland, who beat seventh-seeded Virginie Razzano of France 6-3, 7-6(3) at Stade Pierre de Coubertin.
Fourth-seeded Francesca Schiavone of Italy also advanced after routing Vesna Manasieva 6-0, 6-0. She takes on Lucie Safarova of the Czech Republic, who topped Tamira Paszek of Austria 6-0, 6-3.