Mathias Gydesen posted a 53.81 in the 4th heat of the men’s 100 Fly prelims, and earned the coveted middle lane for timed finals. Cesar Cielo’s 54.31 was the second fastest of the morning, slightly ahead of Peng Wu’s 54.57.

Others punching their ticket to the championship final include Matt Patton (55.42), Alon Mandel (54.81), and Mark Hsu (55.49).

Swimming in her signature event, the 100 Fly, Felicia Lee finished in 1:01.22 to qualify first for tonight’s finals. Qualifying second was Angela San Juan Cisneros in 1:01.62 and third, Jasmine Tosky (1:01.92).

In the final prelim heat, Peter Vanderkaay and Markus Rogan battled to the wall, with Peter gaining the edge in 1:52.95, just ahead of Markus’ 1:53.35 (4th overall). The second fastest time of the event was posted by Djordje Markovic (1:53.18), followed by John Koehler’s 1:53.20.

Chloe Sutton led all qualifiers in the women’s 200 Free this morning, hitting the wall in 2:00.64. Grabbing the second seed in the championship final is Dagny Knutson after a 2:01.10, followed by Kate Zigler’s 2:02.43.

Other qualifiers for the A final include Erika Erndl, Jasmine Tosky, and Melanie Klaren.

5:03:53 PM: 21.41!! New American Record for Cullen Jones in the 50 Free swimoff against Garret Weber-Gale

5:19:51 PM: Chloe Sutton takes gold in the women’s 800 Free in 8:29.34. Haley Anderson also makes the squad, finishing 2nd in 8:31.66

5:33:29 PM: The women’s 100 Free title goes to Dana Vollmer after a 54.00 swim.

5:33:59 PM: Second place goes to Amanda Weir, who hit in 54.03

5:37:28 PM: Why were we treated to, and spoiled by, a couple of sessions with Summer Sanders, only to have her taken away? She should do all interviews!

5:57:54 PM: Another World Record by Aaron Peirsol as he takes the 200 Back in 1:53.08! Ryan Lochte takes 2nd in 1:54.21

6:06:47 PM: Wow! What a week! Seeing WRs go down never gets old!

6:21:29 PM: Another World Record almist went down thanks to Rebcca Soni and her 2:20.38 200 Breast! She challenged, but was just a little short!

6:24:59 PM: Soni’s teammate Keri Hehn locked up the other World Chamops spot with a 2:23.70 swim

6:43:09 PM: Eric Shanteau bettered his 200 Breast American Record from this morning with a 2:08.01 effort

6:44:13 PM: Auburn’s Adam Klein locked up second place with a late charge, finishing in 2:10.39

7:10:11 PM: Jackson Wilcox (15:11.98) and Brennan Morris (15:13.47) will represent Team USA in Rome in the 1500 Free

7:30:42 PM: The Team USA World Championship squad! Good luck to all in Rome! http://yfrog.com/7gklvpj

7:46:17 PM: Just got caught in a crush of fans while trying to chit-chat with Peter Vanderkaay. Love that so many different swimmers are recognized now!

7:54:59 PM: US Open and American Record for Dara Torres in the 50 Fly time trial. 25.50

7:56:16 PM: Women’s team title goes to King Aquatic Club with 167 points

8:31:12 PM: The competition pool is now closed! http://twitpic.com/a2n0y

8:02:28 AM: First event this morning is the women’s 100 Free

8:09:54 AM: Felicia Lee’s 100 Free prelim time = 56.65

8:20:10 AM: Dana Vollmer’s 54.21 was the top time of he women’s 100 Free prelim heats. Amanda Weir qualified 2nd in 54.25, with Magnuson 3rd (54.45)

8:26:17 AM: Matt Grevers 200 Back Prelim = 1:57.04

8:34:54 AM: Tyler Clary (1:55.37) is the top qualifier for the 200 Back final. Aaron Peirsol’s 1:55.78 was the next time with Lochte’s 1:55.99 3rd

8:35:30 AM: Matt Grevers will also race in the A final after earning the 4th seed.

8:37:40 AM: The 200 Back looks to be “the” event of the night. I wouldn’t be surprised if there is a new World Record!

9:01:28 AM: Keri Hehn posted a 2:26.05 200 Breast to lead the field into finals. Next qualifiers: Elizabeth Tinnon (2:27.09) & Rebecca Soni (2:27.35)

9:18:40 AM: Eric Shanteau took down the 200 Breast American Record with a 2:08.43 performance! Can’t wait for finals!

9:24:20 AM: Shanteau is obviously the top seed, followed by George Klein (2:11.25) and Scott Spann (2:12.33)

4:48:58 PM: Action is about to get underway! Looks like another exciting session!

4:57:29 PM: Doing a few awards ceremonies before the 1st event: men’s 100 Free!

5:06:15 PM: Men’s 100 Free B final is a scorcher! Cesar Cielo takes the win in 47.69, just off the US Open record.

5:07:41 PM: Time for the A final! Should be another good heat!

5:09:46 PM: Ryan Lochte scratched, allowing Matt Grevers to race in the championship final

5:11:24 PM: Close race win Grevers ahead at 50, but Nathan Adrian takes the win in 48 flat

5:14:02 PM: Dave Walters takes the second spot in 48.17. Matt Grevers finished 4th, securing a spot on the team for the 400 Free Relay.

5:18:54 PM: Nathan Adrian’s mother as he receives his 1st place award! http://yfrog.com/0tskpvj

5:30:13 PM: Felicia Lee took second in the women’s 200 Fly B final with a best time of 2:10.56. Leah Gingrich won in 2:10.42

5:35:23 PM: Kathleen Hersey (2:06.44) dueled Elaine Breeden (2:07.40) for most of the race before Mary DeScenza (2:07.13) made a late charge.

5:36:40 PM: Hersey and DeScenza will represent Team USA in Rome. What a race!

5:49:36 PM: Ready for the men’s 200 IM championship final!

5:56:15 PM: Ryan Lochte tool a rum at the 200 IM world record and nearly got it. Winning in a meet record 1:54.56.

6:00:04 PM: Tyler Clary took second in 1:56.00, followed by Eric Shanteau’s 1:57.25.

6:05:16 PM: Eric Shanteau took second in 1:56 flat with Tyler Clary grabbing 3rd in1:57.25

6:06:28 PM: Lochte finally busted out his grillz for a domestic meet. Lookin fly and blinged out on the awards stand!

6:07:44 PM: Last individual event of the session: women’s 200 Back

6:21:48 PM: Elizabeth Beisel made a late charge to win the women’s 200 Back in 2:08.80. Liz Pelton hit in 2:09.19, which gives her a 3rd event in Rome!

8:11:37 AM: Some real fast men’s 100 Free heats!

8:14:51 AM: Swimming with some empty lanes around him, Nathan Adrian posted the top 100 Free time of 48.10. Ryan Lochte had the next time of 48.16

8:16:39 AM: Matt Grevers (49.01) and Davis Tarwater (49.14) will race in the B final after qualifying 11th and 13th, respectively.

8:44:48 AM: Elaine Breeden will swim from Lane 4 this evening in the women’s 200 Fly final after a 2:07.78 swim. Kathleen Hersey is #2 seed (2:08.69)

8:46:16 AM: Felicia Lee qualified for the B final. She finished in 2:12.49

9:10:38 AM: Ryan Lochte (1:57.05) and Tyler Clary (1:58.61) gave a possible preview of tonight’s final, qualifying 1-2 in the 200 IM

9:38:34 AM: Elizabeth Beisel stopped the clock at 2:09.36 to earn the top seed of the women’s 200 Back. Liz Pelton advances as the 2nd seed in 2:09.72

9:40:27 AM: Katie Riefenstahl (2:09.98) qualified 3rd, followed by Maggie Meyer (2:11.80)