The challenge round in the college singles tournament will be played this afternoon at 2.30 o'clock on the championship court, Jarvis Field, when Captain R. N. Williams 2d, of the University team meets H. Morgan '17. In the finals of the doubles tournament A. F. Doty '16 and H. Wainwright '15, will face D. Duncan '17 and H. R. Guild '17 on Jarvis Field at 4 o'clock. It is imperative that this match be played today. Men will be defaulted if they do not appear at the appointed time.