ROME (AP) — Top-ranked Iga Swiatek remained on course for an uncommon Madrid-Rome double after beating Angelique Kerber to reach the Italian Open quarterfinals on Monday. It was a ninth straight win for Swiatek, and the two-time Rome champion will next face Madison Keys after the American player eased past Sorana Cirstea 6-2, 6-1 in a match that was interrupted by an environmental protest. Swiatek needed eight set points to secure the opener but had no such problems at the end of the second, sealing a 7-5, 6-3 victory on the first match point when Kerber’s return went wide.