World number 10 Daria Kasatkina showed why she is the highest ranked player at the Granby Championships, defeating fifth seed Nuria Parrizas-Diaz 6-3 6-2 in convincing fashion.

Kasatkina, who is enjoying a career-high ranking, got the job done in straight sets despite struggling with her serve, committing all nine of the match's double faults.

While she was only able to win a below-par 58 per cent of her service points, she also won 58 per cent of her return points, and it was that ability to deal with the Spaniard's serve that proved to be the difference.

Kasatkina will play France's Diane Parry in the semi-final after she got the better of Germany's Tatjana Maria 6-4 6-7 (6-8) 7-6 (7-4) in a near three-hour tussle.

Parry only had one ace compared to Maria's 10, but she excelled in the longer rallies, with her return success rate jumping up from 16 per cent to 47 per cent when she was able to see a second serve.

Australia's Daria Saville will contest the other semi-final after her 6-3 6-0 domination of China's Xiyu Wang, and she will play Ukraine's Marta Kostyuk after she defeated Canada's Rebecca Marino 6-2 4-6 6-2.

Meanwhile, Liudmila Samsonova continued her terrific run at Tennis in the Land as she beat Magda Linette 6-4 6-3.

Samsonova is yet to lose a set at the tournament, but will face her toughest test next when she meets Bernarda Pera in the semi-final.

Pera, who previously eliminated top seed Barbora Krejcikova in straight sets, came out on top against American compatriot Sofia Kenin 6-2 5-7 6-3, despite creating one fewer break point opportunity.

Alize Cornet is also yet to lose a set on her run to the semi-final, proving too strong for Shuai Zhang 6-4 6-2.

Cornet will play Aliaksandra Sasnovich for a place in the final after the Belarusian pulled away in the second set of her 6-4 6-1 win against American Madison Brengle.