The Athletica got a goal from captain Lori Chalupny a quarter of an hour into the game, and it held up for a win in Edwardsville.
"I feel a lot more relaxed," said Atletica coach Jorge Barcellos. "It is kind of hard when you are representing a town and a city and you can't get a win in four games. When you get the win you are relieved that you finally got what you are looking for."
Sky Blue got a goal and assist from Australia Sarah Walsh in its win at Toyota Park.
Fellow Matilda Collette McCallum set up Walsh for the first goal in the eighth minute, and Walsh found Natasha Kai for the insurance goal in the 79th minute.
The New Jersey team held Chicago without a shot on goal in the first half.
Despite their 0-0 tie at the Home Depot Center, Los Angeles and Boston remained 1-2 at the top of standings.
The Sol is now winless in its last three games with only one goal to its credit.
"I thought we played a good first half but we lacked quality finishing," said Los Angeles coach Abner Rogers. "Boston is a very good team and you're not going to get many opportunities to score against them. The chances were there today, but we need to finish better."
TRADE:On the eve of week play, the Sol dealt defender Kendall Fletcher, forward Christie Welsh and a 2011 second-round draft pick have been traded to the Saint Louis Athletica for a conditional 2010 first-round draft pick and a 2011 first-round draft pick.
May 9 in Edwardsville, Ill.
St. Louis 1 FC Gold Pride 0.Goal: Chalupny 16.
St. Louis - Solo, Tancredi (Cross 62), McNeill, Ellertson, Weber, Stoia, Larsson (Fletcher, 57), Woznuk, Chalupny, Aluko, Hanks.
FC Gold Pride -Barnhart, Wilson, Buehler, Dew, Graczyk (Robinson 80), Formiga, DiMartino, Osborne (Erika 72), Weimer (Milbrett 46), Sinclair, Arakawa,
Yellow Cards:St. Louis - Weber 56; FC Gold Pride - Milbrett 56.
May 10 in Carson, Calif.
Los Angeles 0 Boston 0.
Los Angeles -LeBlanc, Bock, Cox, Franko, Makoski (Larkin, 46), Wagner (Abily, 77), Boxx, Miyama, Falk, Marta, Duan.
Boston -Luckenbill, Scott, LePeilbet, Weber, Mitts (Augustyniak-Goffi, 78), Hucles, Lilly, Bishop (Moore, 85), Smith, Schmedes, Latham ( Rodriguez, 51).
Yellow Cards:Los Angeles - Boxx, 79, Abily 92+; Boston - Hucles 50, Augustyniak-Goffi, 89.
Referee: Sandra Serafini.
May 10 in Bridgeview, Ill.
Chicago 0 Sky Blue FC 2.Goals: Walsh (McCallum) 8, Kai (Walsh) 79.
Chicago -Jonsson, Dalmy, Dieke, Igwe (Spilger, 79), Krzysik, Rapinoe (Masar, 66), Klein (Cristiane, 54), Ostberg, Carney, Lloyd, Tarpley.
Sky Blue FC -Branam, Schnur, Rampone (Shaner, 72), Asante, Dowling, McCallum, Sitch, Parker, O'Reilly, Kai (Rosana, 82), Walsh (Averbuch, 65).
Yellow Cards: Chicago - Carney 54; Sky Blue FC - Asante 73, Sitch 75.
TEAM W L T GF GA P
Los Angeles 3 1 2 6 2 11
Boston 3 2 1 8 8 10
Chicago 2 1 2 6 3 8
FC Gold Pride 2 3 1 7 8 7
Sky Blue FC 1 2 2 3 4 5
St. Louis 1 2 2 4 6 5
Washington 1 2 2 9 12 5
Kelly Smith (Boston) 4
Marta (Los Angeles) 3
Daniela (St. Louis) 2
Lori Lindsey (Washington) 2
Kristine Lilly (Boston) 2
Tiffeny Milbrett (FC Gold Pride) 2
Lindsay Tarpley (Chicago) 2
Sonia Bompastor (Washington) 2
Abby Wambach (Washington) 2
Friday, May 15
Los Angeles vs. Sky Blue FC, 10:30 ET
Saturday, May 16
Chicago vs. FC Gold Pride, 8:30 pm ET
Sunday, May 17
Boston vs. Washington, 6 pm ET (Fox Soccer Channel)