No stopping Simona Halep and Petra Kvitova at Madrid Open

Simona Halep made it 14 wins in a row at the Madrid Open while Petra Kvitova took her winning streak to seven.

Defending champion and world No 1 Halep, who is looking for her third title in the Spanish capital, brushed aside Elise Mertens 6-0, 6-3 to move into the third round of the WTA Premier Mandatory event.

It took the Romanian only 21 minutes to secure the opening set as she won 27 points compared to the 10 from Mertens.

Although the Belgian fought back in the second, it was only a matter of time before Halep, who will face Kristyna Pliskova next, saw out the match.

Pliskova was a 7-5, 6-2 winner over Spaniard Sara Sorribes Tormo.

Meanwhile, 10th seed Kvitova secured a 6-3, 7-6 (10-8) victory over Monica Puig in just under two hours.

Kvitova, who won the Prague Open on Saturday, broke twice in the first set and, while there were no breaks of serve in the second set, the Czech prevailed in the tie-breaker.

Fourteenth seed Daria Kasatkina also advanced as the Russian beat Sorana Cirstea from Romania 6-3, 6-1.