Bencic, who saved six match points in the previous round against Aryna Sabalenka, failed to capitalize on an early break in the first set but Halep continued to struggle with her serve and was broken seven times in total. Bencic broke for a 5-4 lead in the second and then raced out to a 3-0 lead in the decider, having won six games in a row.
Halep, who was playing her ninth match in 13 days after reaching the final in Qatar last week, got one break back but Bencic broke again for a 5-2 lead before converting her third match point.
ATP Rio De Janeiro
• Starting Monday 2/18, at 2:30 pm ET, catch live coverage of the Rio Open featuring Dominic Thiem, Fabio Fognini, and Diego Schwartzman.
• Watch Naomi Osaka, Petra Kvitova, Simona Halep and Karolina Pliskova live from the Dubai Duty Free Tennis Championships starting Saturday, 2/16 at 3:00 am ET
• Tennis Channel Plus features live coverage of the Hungarian Ladies Open beginning Monday, 2/18 8:00 am ET
ATP Delray Beach
• Watch Juan Martin del Potro, John Isner and Frances Tiafoe live on Tennis Channel Plus beginning Tuesday, 2/19 at 12:30 am ET.
• See Karen Khachanov, Borna Coric and Stefanos Tsitsipas live on Tennis Channel Plus beginning Monday 2/18, 8:30 am ET