Medalist Eric Egloff of host Manor Country Club came from behind to win two matches yesterday and gain today's final of the 50th Frank Emmet Schoolboy golf tournament. Egloff, who is headed for the University of Richmond, will play Rich Gunderson of Fort Hunt in this morning's 18-hole final at 8:30.

Gunderson, Gunston District champion, hit a 190-yard approach shot with a six-iron out of the woods onto the green and two putted for par to beat Chris Pool of Langley on the first extra hole in his semifinal.

Egloff was in trouble in his afternoon semifinal against 16-year-old John Mackey of Wootton, before winning, 2 and 1. Mackey appeared poised to move three holes ahead when he hit his second shot 20 feet from the hole at the par 4 13th hole and Egloff found a greenside bunker. But Egloff came out of the trap to four feet from the cup and won the hole with par when Mackey three-putted.

Egloff evened the match with par on the next hole and scrambled to a halving par on the par 5 15th hole.

Mackey fell behind when he three-putted the 16th green from 50 feet, and lost the match at the par 3 17th when he hooked his tee shot out of bounds. Egloff parred the hole.