Following are the results from the opening day of the US $3.6 million ATP Tour world championship tennis tournament on Tuesday at Hanover (prefix number denotes world ranking):

White group:

2-Yevgeny Kafelnikov, Russia, beat 6-Todd Martin, United States, 6-4, 1-6, 6-1

Red group:

5-Pete Sampras, United States, bt 3-Gustavo Kuerten, Brazil, 6-2, 6-3

1-Andre Agassi, United States, bt 8-Nicolas Lapentti, Ecuador, 6-1, 6-2