1978 Australian Open – Men's Singles

Men's Singles
1978 Australian Open
Champion	Guillermo Vilas
Runner-up	John Marks
Final score	6–4, 6–4, 3–6, 6–3
Events
Singles men women boys girls Doubles men women mixed boys girls Legends men women mixed WC Singles men women quad WC Doubles men women quad
← 1977 · Australian Open · 1979 →

Vitas Gerulaitis was the defending champion, but did not compete this year.

Guillermo Vilas defeated John Marks 6–4, 6–4, 3–6, 6–3 in the final to win the Men's Singles tennis title at the 1978 Australian Open.

The seeded players are listed below. Guillermo Vilas is the champion; others show the round in which they were eliminated.

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