A trio of Israelis will hope to make their presence felt at the British Junior Open Squash Championships to be held in Sheffield, England this week. Ido Avron, who recently became both the Israel Junior and Senior squash champion, Stav Cohen-Adiv, Israel's junior girl champion and Daniel Poleshchuk, Israel's under-13 champion, are training intensively prior to competing in four-day event which begins today. The British Open attracts over 450 of the best young squash players from all corners of the globe to play in the boys and girls under-13, under-15, under-17 and under-19 age groups. The 18-year-old Avron, who is ranked 13 in Europe by the European Squash Federation but not seeded in these championships, will play in the top age group where his first round opponent will be a seeded player from the US. Cohen-Adiv, aged 14 and ranked six in Europe in the girls under-15 age category, is seeded together with 15 other girls in the 17/32 bracket in her group. Her first round opponent is an unseeded player from Hong Kong. Poleshchuk, 11, is ranked number two in Europe in the under-13 age category. He is one of two players seeded 3/4 in his group of the championships and received a bye in the first round. David Lazarus, an experienced English squash coach, will be advising and encouraging the Israeli players throughout the championships.