Bumptious belly-flopping Boris Becker took the tourney by storm as an unseeded 17-year-old serve-and-volleyer in 1985, first of his three titles. But he may owe it to the sportsmanship of Tim Mayotte (out of Springfield, Mass.) in the fourth round. Becker, twisting an ankle on an outside court, exceeded the time limit for treatment. Mayotte, refusing to accept a default, gave the German extra minutes to recover, and lost in five sets.