Australian Open champion Caroline Wozniacki eased into the Madrid Open second round with victory over Daria Gavrilova.
Three seeded stars, including Jelena Ostapenko, were beaten as the Madrid Open got under way.
Top seed Alexander Zverev got his revenge against Hyeon Chung and reached the BMW Open final on Saturday.
Elise Mertens beat Ajla Tomljanovic in the Grand Prix de SAR La Princesse Lalla Meryem final for her third title of the season.
Home favourite Petra Kvitova defeated Mihaela Buzarnescu to win the Prague Open on Saturday.
A familiar foe in the form of Hyeon Chung stands in the way of Alexander Zverev and the BMW Open final.
Kei Nishikori poses a tough challenge for Novak Djokovic at the Madrid Open, while Rafael Nadal is on the opposite half of the draw.
A first-set comeback inspired Petra Kvitova to a semi-final victory over Zhang Shuai at the Prague Open.
A knee complaint that has troubled Marin Cilic since Monte Carlo last month has forced the Croatian to withdraw from the Madrid Open.
The Estoril Open staff had to be on their best behaviour in front of Portugal's president, while newly married Marin Cilic fell in Istanbul.