Dave Oakley of host Westwood Country Club won two hard-fought matches, and defending champion Masanori Suzuki was eliminated in the first round in the Washington Metropolitan Golf Association Championships yesterday.

Oakley, who won this tournament twice when it was known as the District Amateur, knocked a seven-iron shot into the cup from the fairway to eagle the third hole in his morning first-round match against Ron Lark of Robin Dale. Oakley, who shot three-under-par 69 to win the medal in Thursday's qualifying, was one under par through nines holes against Lark, but still trailed by one. Oakley rallied to win four holes on the back nine to win, 3 and 1.

Oakley beat former WMGA champion Frank Abbott of Lakewood, 1 up, in his afternoon match. Oakley had a 1-up lead heading to the par-4 18th hole and both parred, giving Oakley the victory. Oakley, 40, a buyer for a furniture firm, was a pro from 1967 through 1970, and had second-place finishes in the Thailand and Spanish opens. He cited too much travel as the main reason for returning to amateur status.

Suzuki, of Indian Spring, lost his opening match to Ray Montgomery of Reston South on the first extra hole. On the par-4 playoff hole, Suzuki hit his approach shot beyond the green and his eventual double bogey lost to Montgomery's bogey. Montgomery then lost to Barrett Hubbard of International, 1 up.

Marty West of Rockville, seven-time Maryland Amateur champion, scored a 6-and-5 morning victory over Donald Meyer of Indian Spring, then defeated long-hitting Wayne McGowan of Chantilly, 2 and 1, in the afternoon.

Eric Egloff of Manor beat Jim Bielaski of Bretton Woods, 1 up, in a second-round match in which Egloff called a hole on himself after he discovered he hit a ball other than his own from the rough. Bielaski won another hole when he hit a 230-yard four-wood second shot into the hole for eagle 2.