Henri deLozier and Tony Ciconte eliminated former professional Wayne McGowan and Dave Oakley, 2 and 1, yesterday and gained today's semifinals of the Belle Haven Four Ball golf tournament.

The Columbia Country Club team will face last year's runners-up, Vinny Giles and Dave Wysong, in an 8 a.m. semifinal followed by the other semifinal pitting Robin Dale's Reb Bean and Paul Hightower against Congressional's Brian Johnson and John Vardaman.

McGowan and Oakley eliminated last year's winners, Ed Offterdinger and Matt Sughrue of Bethesda, 1 up, in a morning first-round match. McGowan clinched that match when he hit his wedge second shot to within two feet of the cup on the par-4 18th hole for a conceded birdie.

Two of the three teams that tied for low at 68 in qualifying were eliminated. In a first-round match, comedalists Eric Smith and Mike Richter of the University of Maryland were turned back by Columbia Country Club teen-agers Richard Holland and Dan McAndrews, 1 up. McAndrews and Holland lost to Johnson and Vardamon in heartbreaking fashion on the 18th hole in the afternoon when Holland missed a three-foot putt for par.

Another medal-sharing team, Ron Rhodes and Dick Schmidt of Kenwood, lost their second-round match to Bean and Hightower on the first extra hole when Hightower lagged up to within "gimme" distance for birdie on the par-5 hole.

Former U.S. Amateur and British Amateur champion Giles and Belle Haven partner Wysong were able to cope with the wind the best. They recorded eight birdies in two rounds, with Giles responsible for six. In a morning 1-up victory over Gary Marlowe and Dave Wortman of Woodmont, Giles and Wysong held a one-hole lead heading to 18. Giles three-putted the final green but Wysong made a par, after driving into rough, to close out the match. Giles and Wysong beat Nick Young and Ken Weakley, 3 and 2 in the afternoon.