Complex sentence: At the 2017 Internazionali BNL d'Italia Keys was the defending finalist after losing to Serena Williams in the final last year, she lost in the first round again to Daria Gavrilova.
Split into simpler sentences: At the 2017 Internazionali BNL d'Italia Keys was the defending finalist after losing to Serena Williams in the final last year. She lost in the first round again to Daria Gavrilova.