LONDON, UK - The Top 4 seeds all made it to through the semifinals of The Championships, and on Thursday, after having taken out all of their challengers, they squared off against each other for spots in Saturday's championship final.

Neither Serena Williams nor Elena Dementieva had really been challenged on the way to the semifinals, with Williams losing 25 games in five matches and Dementieva dropping just 20 games in her five rounds. It wasn't a mistake, though - both were playing impeccably during the fortnight, as evidenced by the incredibly high-quality first semifinal they played Thursday afternoon.

After trading breaks of serve in the first two games of the match, Williams and Dementieva put on a serving display, holding without too much trouble through a tie-break. And it was the No.4-seeded underdog who prevailed, as Dementieva took it to the No.2-seeded Williams, snapping up a one set lead, 7-4.

The second set was just as close, the two players trading breaks early before holding serve through 5-all. Williams then broke and served it out, finishing it off with a huge ace out wide on the ad side. Dementieva wasn't without chances to break throughout the middle set however, holding several break points late in the set; the 10-time Grand Slam champion was just too tough on them however, saving two with risky forehand winners and another with a trademark ace.

The third set was even tighter than the others, and Dementieva definitely had her chances to reach her first Wimbledon final - she led a break early on, and even held match point leading 5-4. Williams hung extremely tough, grabbing that break back and hitting a gritty volley winner down match point, one that clipped the tape on its way to becoming a winner. She would win, 67(4) 75 86.

"It was really, really tough. She has been playing so well and she won a lot of matches against me in the past, so I was hoping to finally do a little better against her," Williams said. "I knew if I was calm and positive, I'd make it. I was looking at my family a little bit today because I wasn't playing my best. Now I'm going to come back out and watch Venus and cheer her on."

While No.3 seed Venus Williams lost even fewer games en route to the semis than her sister and Dementieva - 19 - Dinara Safina, the top seed, had the toughest path to the final four, losing 22 games in her first three rounds alone and losing sets in both her fourth round and quarterfinal matches, defeating Amélie Mauresmo first, 46 63 64, and Sabine Lisicki next, 67(5) 64 61. In Williams she faced one of the best grass court players of all time, though, and the American blasted her off the court in just 51 minutes, hitting 16 winners to one unforced error - just one - during a 61 60 Centre Court demolition.

"Dinara is so talented and she has played so consistently in the last year. I just went out there and focused, and I have so much experience on this court, which also helped," Williams said. "It's a dream come true to be here and have the opportunity to hold the plate up again. It's so exciting. It was hard to watch all the drama in the first semifinal, but now the hardest part is to come out again and play Serena Williams."

The Williams sisters have played 20 times before, and the series is tied, 10-10. They are 2-2 on grass, with Venus winning in the 2000 Wimbledon semifinals and the 2008 Wimbledon final and Serena winning in the 2002 Wimbledon final and 2003 Wimbledon final. They are 1-1 this year, with Venus winning in the Dubai semifinals and Serena winning in the Miami semifinals. Perhaps the only relevant head-to-head lead is Serena's 5-2 edge in Grand Slam finals, although Venus won their last one. Check out the Williams sisters' head-to-head.