Meldrick Taylor of Philadelphia upset Robin Blake in a 10-round lightweight bout in Lake Charles, La., winning a unanimous decision that probably will make him the first 1984 Olympic gold medalist to break into the top 10 professional rankings.

Taylor, 19, used his speed and aggressive style to keep the pressure on Blake, 23, and to repeatedly foil the left-hander's uppercuts.

Blake (27-4), of Levelland, Texas, tried to take control in the fifth and sixth rounds, but Taylor (10-0), his lip bleeding profusely, picked up the pace in the seventh and dominated the rest of the bout. It was the first time Taylor had fought more than eight rounds . . .

Paul Gonzales, the 1984 Olympic light flyweight champion, won a unanimous 12-round decision over Alonso Strongbow in Los Angeles to take the North American Boxing Federation flyweight title in only his third professional fight.

The 111 1/2-pound Gonzales dominated both the early and late rounds. It was the fourth straight defeat for Strongbow (19-9-1), who won the NABF title over Mario Savala in October 1984 and then lost three straight non-title bouts.

In an earlier bout on the card, heavyweight Henry Tillman, another Olympic medalist, improved his pro record to 8-0 with a first-round knockout of Sylvester Lee.