The 1973 Viceroy 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 inaugural edition of the event and was held from 29 October through 4 November 1973.

The tournament was part of the Grade C tier of the 1973 Grand Prix tennis circuit.

Rod Laver won the singles title.

[3] Rod Laver defeated Charlie Pasarell 6–3, 3–6, 6–2, 6–2 Colin Dibley / Rod Laver defeated Paul Gerken / Brian Gottfried 6–3, 5–7, 17–15