The twentieth annual tournament for the Harvard interscholastic tennis championship in singles will begin on Jarvis Field this morning at 9 o'clock. The tournament will probably be brought down to the semi-finals today, and completed on Monday and Wednesday afternoons, beginning each day at 2.30 o'clock.

Prizes will be given to the winner and to the runner-up. The winner will also have the right, as Harvard interscholastic champion for 1911, to play at Newport in August for the national interscholasic championship. A championship shield will be presented to the school winning the greatest number of points, each match actually won counting as one point.

Entries have been received as follows: Exeter--F. Cady, H. L. Carr, W. E. Davis, J. H. MacVeagh; Lowell High--N. S. Tibbetts; Malden High--A. S. Peabody; Newton High--R. Baldwin, F. Fripp, C. Moore, A. F. Partridge; Rogers High--J. S. Brown, Jr., L. H. Hobbs; St. Mark's--G. C. Caner; Stone--A. R. Chapin, E. J. Howe, 2d, A. H. Hernandez, H. V. Lerex, T. E. Murphy, E. B. Shephard; Volkmann--L. Clark, C. B. Doten, R. A. Steinart, E. P. Warner; Worcester Classical High--E. Lannier, R. Russell, H. R. Stewart.