Complex sentence: In round four of the Americas tournament in Buenos Aires, Argentina, the United States lost 52--24 to Argentina and 31--14 to Canada, but defeated Uruguay 21--16 in their last game to qualify for the 1999 tournament.
Split into simpler sentences: In round four of the Americas tournament in Buenos Aires, Argentina, the United States did not get off to an ideal start, losing 52--24 to Argentina and 31--14 to Canada. They defeated Uruguay 21--16 in their last game to qualify for the 1999 tournament.