LUXEMBOURG - Top-seeded Caroline Wozniacki of Denmark struggled to a 6-3, 7-6 (2) win over local favourite Mandy Minella to reach the second round of the Luxembourg Open on Tuesday.
Second-seeded Sloane Stephens of the United States made lighter work of her day as she beat 2009 champion and Swiss wild card Timea Bacsinszky 6-3, 6-3.
Two seeds fell: No. 4 Kirsten Flipkens of Belgium lost to Katarzyna Piter of Poland 6-4, 6-2, and No. 6 Mona Barthel of Germany lost to Stefanie Voegele of Switzerland 1-6, 6-4, 7-6 (3).
Third-seeded Sabine Lisicki of Germany also was in trouble early on against Croatia's Donna Vekic before she recovered to win in three sets 2-6, 6-3, 6-0.