1973 Pacific Southwest Open – Singles

The 1973 Pacific Southwest Open – Men's singles was an event of the 1973 Pacific Southwest Open tennis tournament and was played on outdoor hard courts at the Los Angeles Tennis Center in Los Angeles, California, in the United States, between September 17 and September 23, 1973. The draw comprised 64 players of which 16 were seeded. Eight players qualified via a 64-man qualifying and a 203-man pre-qualifying event. Stan Smith was the defending Pacific Southwest Open champion but was defeated in the quarterfinals. Unseeded Jimmy Connors won the title by defeating unseeded Tom Okker in the final, 7–5, 7–6(11–9).

Seeds
• 🇺🇸 Stan Smith (quarterfinals)

• 🇷🇴 Ilie Năstase (semifinals)