Tom McKean of Britain beat compatriot Sebastian Coe at 800 meters, and Sergei Bubka of the Soviet Union suffered a rare loss in the pole vault Friday at the IAAF Grand Prix track and field final.

Bubka, the world champion and a big favorite for next month's Seoul Olympics, was beaten by countryman Rodion Gataullin.The meet at Olympic Stadium did bring expected victories from Said Aouita of Morocco in the mile, Calvin Smith of the United States in the 100 meters and Paula Ivan of Romania in the women's 1,500.

McKean, who has run sluggishly in Europe this month but will run the 800 in the Olympics, won in a slow time of 1 minute, 47.60 seconds with Coe second in 1:47.87.

Bubka failed three times at 19-4 1/4 (5.90m), 6.4 inches below his world record height, to leave Gataullin the winner at 19-6 1/4 (5.95m). Gataullin failed three times to raise the world record to 19-11 1/2 (6.08m).

Aouita was timed in 3:56.21, finishing ahead of American Jim Spivey (3:56.55). Jose-Luis Gonzales of Spain, the silver medalist at last year's World Championships, was third in 3:56.67.