The Czech player, twice the victor in Madrid in 2011 and 2015, took an hour and five minutes to beat the Russian player on Thursday, reports Efe. Bertens made one last push on the return in game seven, breaking back to reduce her deficit but she failed to hold serve in the next game and Petra served for the title at 5-3.
Czech Republic's Petra Kvitova eliminated Russian Daria Kasatkina in the quarter-finals of the Madrid Open 6-2, 6-0 and progressed to the semi-finals of the tournament.
In a big-hitting, roller-coaster of a final, Kvitova claimed her 24th career title on the back of 39 winners and 58 unforced errors.
"Every title feels great". But on the other hand I know how tough it is. Probably I can play well there. Three years ago at Wimbledon Petra dismantled Kiki 6-1 6-0 but this match they played today in Madrid has nothing to do with that one, as they pushed each other to the limits for nearly three hours and in every single one of 238 points that have been played!
While their last match was a one-sided encounter that Kvitova won easily, this time around it was a different story, with Bertens providing a very stiff challenge. This is the fourth crown of the season for the Czech and the 24th overall, continuing where she left last week in Prague where she lifted the first trophy in front of the home crowd. It's different attitude, different balls.
"I think he picked up his level", said Shapovalov, a product of Richmond Hill, Ont. "We'll see what happens".
The 20th-ranked Bertens just won Charleston and has taken 11 of her last 12 matches. Any chance of nerves showing was put to rest as Kvitova didn't drop a point in the final game, clinching the set, 6-4, and the title.
The Dutchwoman had beaten Caroline Wozniacki and Maria Sharapova in a sparkling week in the Spanish capital to reach her first premier mandatory final and recovered well from surrendering the first set to take the second.
"Petra is also one of the biggest fighters out there, so it was tough", said 26-year-old Bertens, the world number 20.