The United States beat Nigeria 1-0 to take top spot in the 'Group of Death' on Tuesday and move onto the knockout round of the Women's World Cup with Australia

Abby Wambach, the all-time leading scorer in women's soccer, added to her record total in the 45th minute and that was the only goal the Americans would need to finish the group phase unbeaten with a record of 2-1-0.

The Nigerian challenge faded in the 69th minute when the Super Falcons were reduced to 10 women after Sarah Nnodim was shown the red card for a clumsy challenge on Sydney Leroux.

Hope Solo collected her 173rd cap to pull level with Briana Scurry for most international appearances by a U.S. goalkeeper, while Wambach's 14th World Cup tally moved the American captain into a tie for second on the all-time list with Germany's Birgit Prinz.

Elsewhere...

In Edmonton, Australia (1-1-1) clinched the runnerup spot in Group D and a place in the round of 16 with a 1-1 draw with Sweden. The Matildas went ahead in the fifth minute on a goal from Lisa De Vanna before Sofia Jakobsson equalised for the Swedes 10 minutes later.

Fifth ranked Sweden (0-3-0) could yet advance with the four best third-place finishers of the tournament also qualifying for the knockout.

African challenge is on

Cameroon scored two second half goals to edge Switzerland 2-1 on Tuesday and qualify for the knockout phase of the Women's World Cup along with defending champions Japan.

With unbeaten Japan clinching top spot in Group C with a 1-0 win over Ecuador, Switzerland and Cameroon stepped onto Commonwealth Stadium level on three points with the winner guaranteed passage to the next round.

The Swiss could yet advance with the four best third-place finishers of the tournament also qualifying for the round of 16. In Winnipeg, Yuki Ogimi's fifth minute goal accounted for all the scoring as Japan eased through the group phase with three wins.

South American debutant Ecuador, outscored 16-1 in their opening two contests, put up a brave effort against the champions but never really threatened, exiting the tournament without a win.

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