1.   Becker already has beaten Sampras twice in straight sets indoors in the past month, most recently in round-robin play here on Wednesday.

2.   After round-robin play in each division, the two leaders in each division advance to direct-elimination semifinals and final.

3.   After round-robin play in the divisions, the division champions will meet for the title Saturday.

4.   Costa Rica, the winner of Group C, will face Haiti, which upset Ecuador in round-robin play.

5.   The teams are divided into two pools for round-robin play.

6.   The top two teams from each group advance after round-robin play.

7.   After round-robin play in two groups, the two top finishers advance to the semifinals.

8.   After round-robin play, the group winners face each other Saturday.

9.   After single round-robin play, the second- and third-place teams play a crossover, single-elimination second round.

10.   Argentina probably needs a win because England, which also has four points, completes round-robin play against a likely unmotivated and eliminated Nigerian side.