SEVILLE, Spain (Reuters) -Gabriela Dabrowski and Leylah Fernandez beat Katerina Siniakova and Barbora Krejcikova to secure a 2-1 victory over Czech Republic on Saturday and send Canada into the Billie Jean King Cup final for the first time.

Krejcikova, the world number 10, put the Czechs ahead with a 6-2 6-1 singles win over 18-year-old Canadian Marina Stakusic.

However, Wimbledon champion Marketa Vondrousova, having arrived late from the WTA Finals in Cancun, was stunned by the 21-year-old Fernandez who claimed a 6-2 2-6 6-3 win.

"I feel like it was a great match, and she (Fernandez) played amazing shots. I was a bit unlucky in the third set," Vondrousova said.

The showdown went to the doubles clash, with 11-times winners the Czechs failing to clinch victory, as Krejcikova and Siniakova lost 7-5 7-6(3) to Dabrowski and Fernandez.

"Definitely, is being a great day for us, Team Canada. In the singles match I was super happy to have the crowd with me, cheering me on that really help me," said Fernandez.

Earlier, Jasmine Paolini defeated Tamara Zidansek and Martina Trevisan beat Kaja Juvan in Italy's 2-0 win over Slovenia to advance to the final and continue their quest for a fifth crown.

Paolini survived a wobble midway through the second singles clash before the world number 30 battled past Zidansek 6-2 4-6 6-3 to send her team through to the title clash, sparking huge celebrations from Italian fans at the Estadio de la Cartuja.

The 27-year-old Paolini was trailing 2-0 in the decider but quickly rediscovered her rhythm to dash the hopes of first-time semi-finalists Slovenia, the lowest-ranked of the 12 countries in the competition.

Trevisan put Italy on course to reach the final for a sixth time with a battling 7-6(6) 6-3 victory over Slovenian world number 104 Juvan.

After edging a tight opening set, the 43rd-ranked Trevisan fought back from 3-1 down in the second and grabbed the decisive break in the eighth game to seal victory in two hours and 20 minutes.

"I have to say that today was really tough," Trevisan said as Italy tasted success in their first semi-final appearance in the competition since 2014. "A lot of emotions and a lot of firsts."

Italy's last triumph in the competition came 10 years ago, and they will face stiff competition in Sunday's title clash from Canada who have yet to win the tournament.

(Reporting by Shrivathsa Sridhar in Bengaluru; additional reporting Angelica Medina in Mexico City Editing by Ed Osmond)