World number one Simona Halep breezed past Belgium's Elise Mertens to reach the third round of the Madrid Open.
The Romanian won 6-0 6-3 in 71 minutes to end Mertens' 13-match winning streak.
Halep won the first eight games of the match and hit 23 winners as she set up a meeting with Czech Kristyna Pliskova.
Earlier, world number 10 Petra Kvitova won her seventh consecutive match with a 6-3 7-6 (10-8) victory over Puerto Rico's Monica Puig.
Czech Kvitova, who won the Prague Open on Saturday, had lost both her previous meetings with Puig.