A boy from Belgium has never won the US Open boys' singles title.

A boy or girl from the Philippines has never won any Grand Slam singles title.

One or both of those nevers could get erased on Saturday at the Billie Jean King National Tennis Center in New York.

Gilles Bailly of Belgium won his fourth consecutive three-set match on Friday to reach his first US Open junior final, while Alexandra Eala of the Philippines continued her dominant run, winning her fifth straight-sets match in a row, to reach her first junior Grand Slam final.

Bailly, the No. 2 seed, beat No. 9 seed Coleman Wong of Hong Kong, 3-6 6-3 6-3 and will now face No.5 Martin Landaluce of Spain, who bested top-seed Daniel Vallejo of Paraguay, 6-3 6-2.

With former Belgian tennis superstar Kim Clijsters again watching from the stands, Bailly used stoic defense and consistency to withstand 34 winners from Wong and make his second Grand Slam final of the year (three months after he fell to France's Gabriel Debru in the boys' final at Roland Garros championship).

“I wasn’t playing that bad, I missed an easy volley for the first set (break), but I just knew there would be chances if I stayed in the match,” Bailly said. “For Kim to be there watching, she’s a legend of tennis, a legend of Belgium, it’s unbelievable that she came and watched me, and encouraging me. She’s such an example for me.”

After losing the first set, Bailly took a bathroom break and said he just needed “to re-set.”

“I knew I needed to have confidence in myself, and told myself I could do it,” Bailly said. “I don’t have the biggest forehand or the huge serve, but my physical [condition] is really strong, and that helps me get through in these matches. They’re going to have to win it, I’m not going to lose it.”

Eala also goes for history on Saturday, and she again had a ton of support on Friday, as dozens of local Filipinos ringed Court 12.

Eala, the 10th seed, raced through the first set of her semi-final against Canada’s Victoria Mboko, the No. 9 seed, winning 6-1 in 26 minutes.

Mboko found her footing in the second set and was much more competitive, but at 4-all in the tiebreaker, Eala drilled a forehand crosscourt winner to gain the edge, and a minute later she had advanced.

Eala shook hands with Mboko and the chair umpire and then covered her face with her hands, crying in celebration and disbelief at what she had done. She then walked over to hug her parents and celebrate.

“After I won all of the emotions and feelings went out in one gulp,” Eala said. “The first few seconds after a win are the most intense. I’m over the moon, and just happy to be able to share this moment with my family.”

Eala is well aware of what a Slam victory would mean to her, and her country.

“It would be incredible, because I’m so proud to represent Philippines and I think it would be such an achievement,” Eala said.

In the final Eala will face Lucie Havlickova, the No. 2 seed from Czech Republic, who like Bailly will be making her second Slam finals appearance of the year. Havlickova overcame her doubles partner, No. 7 seed Diana Shnaider of Russia, 6-4 6-4.

“It feels unreal and amazing; I don’t have words for how I feel right now,” Havlickova said. “You get to the semi-finals, and you feel good because either way, you have made it to the semis. So I was just trying to enjoy it and it worked out well.”

Eala and Havlickova have never played each other, but Eala should be the more-rested player. Havlickova had to play her singles match and two doubles matches Friday, while Eala played just her singles match.

Landaluce gained the surprisingly-easy victory by breaking Vallejo early in each set and holding his own serve easily.

“It was my best match of the tournament, definitely,” Landaluce said. “A lot of the games were close but I was playing so aggressive, and trying to pressure him as much as I could. I got a great start and that was the key.”

For Bailly, like Havlickova, this is his second Slam final of the year, while Landaluce will be making his maiden appearance at this stage.

Bailly thinks that gives him an edge.

Bailly and Landaluce have played once before; Landaluce beating fellow 16-year-old Bailly 7-5 6-3 in the third round at Wimbledon this year.

“The pressure, being in a Slam final, it's unbelievable, the first time and now the second time,” Bailly said. “But now I feel I have more of an advantage to Martin, because he's never been in a final. I'm going to try to use my experience to help me in the match.”

Both doubles finals will also be played Saturday. Havlickova and Shnaider will take on Germany’s Ella Seidel and Carolina Kuhl in the girls' doubles final, after both pairs won two matches on Friday.

The boys' doubles final will pit the American team of Nishesh Basavareddy and Ozan Baris against Bolivia’s Juan Carlos Prado Angelo and Switzerland’s Dylan Dietrich.