Tonight, tomorrow and Sunday, the Fifth Annual Boston Open Squash Tournament will be staged at Harvard's Hemenway Gymnasium. The tournament brings to Boston the world's best squash players, both professional and amateur.

Competing in this year's tournament are former Harvard greats Vic Niederhoffer, who ranked atop the 1973 National Squash Rankings, Peter Briggs, Harvard's recent NCAA champion, and Jay Nelson. In addition, Mo Khan, Harvard Club's professional and runner-up in last year's tournament, will be participating.