The 1975 Citizen's Classic, also known as the Hong Kong Open, was a men's tennis tournament played on outdoor hard courts in Hong Kong. It was the third edition of the event and was held from 10 November through 16 November 1975. The tournament was part of the Grade B tier of the 1975 Grand Prix tennis circuit. Unseeded Tom Gorman won the singles title.[1]
Tom Gorman defeated Sandy Mayer 6–3, 6–1, 6–1
Tom Okker / 
Ken Rosewall defeated Bob Carmichael / Sandy Mayer 6–3, 6–4