The 16-year-old Sharapova won her first WTA title, something her better-known compatriot is yet to achieve.
The American ace beat Vera Zvonareva while US Open champion Kuznetsova accounted for Wimbledon champion Maria Sharapova in the semi-finals of the China Open.
Serena Williams and defending champion Maria Sharapova remained on course for a heavyweight Madrid Open final.
The Wimbledon champion beat Kristina Brandi of Puerto Rico 6-1, 6-4 at the $1.3 million Montreal Cup.
The defending champion was made to sweat by Slovenia's Katarina Srebotnik in the third round of the women's singles at Wimbledon.
Maria Sharapova edged out Samantha Stosur 6-3, 3-6, 6-1 to reach the quarter-finals of the DFS Classic grass court tournament
The 17-year-old withdrew from next week's JP Morgan Chase Open following her unexpected victory at Wimbledon.
Maria Sharapova made light of her long injury layoff by advancing to the last four of the WTA Finals with an unbeaten record in round robin play after the Russian breezed past Flavia Pennetta 7-5, 6-1 on Thursday, and booked a surprise passage to the semi-finals for Agnieszka Radwanska.
Serena will be chasing her seventh grand slam title on Saturday against a 17-year-old who has taken her second Wimbledon by storm.
Justine Henin-Hardenne fought from a match point down to beat Svetlana Kuznetsova and set up a clash with Maria Sharapova
Sharapova beat Lindsay Davenport while the defending champion beat Amelie Mauresmo in the women's singles semi-finals at Wimbledon.
A preview of the Ladies semi-finals at Wimbledon.
Amelie Mauresmo will play Russian Vera Zvonareva in the semi-final of the Rome Masters
The Belgian injured her right leg in an awkward slide to the net during a third-round match against Switzerland's Patty Schnyder.
The Belgian claimed her second successive claycourt title when she beat Russian Svetlana Kuznetsova in the final of the Warsaw WTA event.
Leading Russians, third seed Anastasia Myskina and fourth seed Nadia Petrova, tumbled out in the Rome Masters.
Maria Sharapova has been left out of Russia's Fed Cup first-round tie against Italy later this month because of her hectic tournament schedule
Belgium's Kim Clijsters downed Maria Sharapova 6-3, 7-5 to win the Nasdaq-100 Open and claim her second consecutive title