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Florianopolis, Brazil (Sports Network) - Former world No. 1 star Venus Williams was an easy opening-round winner Tuesday at the inaugural WTA Brasil Tennis Cup.

After having her first-round match rained out here on Monday, the top-seeded American Williams promptly dismissed Croat Mirjana Lucic-Baroni 6-3, 6-3 in 79 minutes on the hardcourts at Federacao Catarinense de Tenis, where rain interrupted play once again on Tuesday.

Meanwhile, seventh-seeded Frenchwoman Kristina Mladenovic handled Brit Anne Keothavong 6-3, 6-4.

Additional wins came for German Tatjana Malek, Hungarian Timea Babos and Spaniard Garbine Muguruza, who is rewarded with a second-round bout against the seven-time Grand Slam singles champion Williams.