Complex sentence: Then she reached the semifinals at 2015 Monterrey Open, after beating Lauren Davis, Tímea Babos and for the first time Anastasia Pavlyuchenkova, all in straight sets, but she lost to Timea Bacsinszky in a thriller match.
Split into simpler sentences: Then she reached the semifinals at 2015 Monterrey Open, after beating Lauren Davis, Tímea Babos, and for the first time Anastasia Pavlyuchenkova, all in straight sets. However, she lost to Timea Bacsinszky in the final in a thriller match.