Week 4 in Women's Professional Soccer demonstrated the league's early season parity with teams in sixth and seventh-place in the eight-team standings notching wins over teams above them in the table, and for the first time all season no contest finished in a draw as four teams earned the maximum three points.

It was FC Gold Pride (3-1-0), which became the first team to notch three wins on the year, with a 1-0 victory at Sky Blue FC (2-2-0) that propelled them into sole possession of first place. Canadian international Christine Sinclair had the game-winning strike in the first half, as FC Gold Pride held off the defending champions in the second despite improved play from New-Jersey side for the final 45.

The Philadelphia Independence (2-0-2) won a rematch in the battle of the expansion teams with a 1-0 victory over the Atlanta Beat (0-3-1) on a goal by WPS Player of the Month for April, Lori Lindsey. The Independence remain the only undefeated team in WPS and would become the first WPS team ever to start the season with a five-game unbeaten streak if they can win or tie next weekend at Saint Louis. They have eight points from four games and stand just one point behind FC Gold Pride in the table.

The Washington Freedom (2-2-0) moved from sixth-place to third in the standings with an impressive 3-1 victory over the Saint Louis Athletica (1-1-2) in an MLS-WPS doubleheader at RFK Stadium, while the Chicago Red Stars (1-2-1) had their first multi-goal game of the season winning on the road, 2-0, against the Boston Breakers (1-1-2) to earn their first win in 2010. The Red Stars were paced by goals from rookie Casey Nogueira, her second of the year, and Brazilian international Cristiane, who tallied her first. Athletica's Eniola Aluko and FC Gold Pride's Sinclair lead the league in scoring with three goals each so far on the campaign.

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