The 1986 Transamerica Open, also known as the Pacific Coast Championships, was a men's tennis tournament played on indoor carpet courts at the Cow Palace in San Francisco, California in the United States. The event was part of the 1986 Nabisco Grand Prix circuit. It was the 98th edition of the tournament and was held from September 22 through September 28, 1986. Fourth-seeded John McEnroe won the singles title, his fifth and last at the event after 1978, 1979, 1982, and 1984 and earned $44,000 first-prize money.[1]
See main article: 1986 Transamerica Open – Singles. 
John McEnroe defeated Jimmy Connors 7–6(8–6), 6–3
See main article: 1986 Transamerica Open – Doubles. Peter Fleming / John McEnroe defeated Mike De Palmer / Gary Donnelly 6–4, 7–6(7–2)