Poland's world No 1 Iga Swiatek handed Romania's Andreea Prisacariu a double bagel en route to victory in their Billie Jean King Cup qualifier on Saturday, securing the decisive third point in the tie and a spot in November's finals for the first time.
Swiatek, who put her country up 2-0 on Friday's opening day by thrashing Mihaela Buzarnescu 6-1 6-0 for an 18th straight win, continued to stamp her authority on the tie as the 20-year-old broke Prisacariu six times in Radom, Poland.
"I'm really proud. I was really working hard for that. Even though I didn't play last year, I feel it's been a long journey and it took us a few years to progress step by step and qualify for the finals," Swiatek said after her 6-0 6-0 victory.
"It just shows what a strong team we are. Hopefully, in the finals, we're going to show even more progress and we're going to succeed."
Marketa Vondrousova and Karolina Muchova won the doubles decider for 11-time champions Czech Republic to clinch their finals berth with a 3-2 victory over Britain after beating Harriet Dart and Katie Swan 6-1 7-5 in Prague.
Vondrousova, the 2019 French Open runner-up, earlier picked apart Emma Raducanu 6-1 6-1 as the teenager struggled with blisters on her right foot before Dart levelled the tie at 2-2 with a 6-0 5-7 6-2 win over 16-year-old Linda Fruhvirtova.
"I was a bit nervous at the end but I used to play with Kaja, so I am very happy that we won and I think we enjoyed the doubles today," Vondrousova said.
Also advancing to the finals are Kazakhstan, who progressed at the expense of Germany with Elena Rybakina coming from a set down to get past three-time Grand Slam champion Angelique Kerber 4-6 6-3 7-5 in Nur-Sultan.
Four-time winners Italy also advanced after Camila Giorgi, who had given her country a 2-0 lead on Friday, secured the decisive point in their victory over France in Sardinia with a 6-2 6-0 thrashing of Harmony Tan.
Spain will bid for a sixth title, despite missing Paula Badosa and Garbine Muguruza this weekend, after Sara Sorribes Tormo beat Arantxa Rus of the Netherlands 6-0 6-4 to secure their passage to the finals.
Canada, led by US Open runner-up Leylah Fernandez, and the US are also in prime position to advance with 2-0 leads before resuming their ties against Latvia and Ukraine respectively later on Saturday.
Belgium are already in the finals after receiving a walkover with opponents Belarus being suspended from international team competitions following Russia's invasion of Ukraine.
Belarus is a key staging area for the invasion, which Russia calls a "special operation."