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1978 Australian Open 
Summary
The 1978 Australian Open was a tennis tournament played on outdoor grass courts at the Kooyong Lawn Tennis Club in Melbourne, Australia and was held from 25 December 1978 to 3 January 1979. It was the 67th edition of the Australian Open and the fourth Grand Slam tournament of the year. The singles titles were won by Argentinian Guillermo Vilas and Australian Chris O'Neil.
| 1978 Australian Open | |
|---|---|
| Date | 25 December – 3 January 1979 |
| Edition | 67th |
| Category | Grand Slam (ITF) |
| Surface | Grass |
| Location | Melbourne, Victoria, Australia |
| Venue | Kooyong Lawn Tennis Club |
| Champions | |
| Men's singles | |
 Guillermo Vilas[1] | |
| Women's singles | |
 Chris O'Neil[2] | |
| Men's doubles | |
 Wojciech Fibak / Kim Warwick[3] | |
| Women's doubles | |
 Betsy Nagelsen /  Renáta Tomanová[4] | |
Seniors edit
Men's singles edit
Guillermo Vilas defeated John Marks, 6–4, 6–4, 3–6, 6–3 [1]
- • It was Vilas' 3rd career Grand Slam singles title and his 1st title at the Australian Open.
Women's singles edit
Chris O'Neil defeated Betsy Nagelsen, 6–3, 7–6(7–3) [2]
- • It was O'Neil's 1st and only career Grand Slam singles title.
Men's doubles edit
Wojciech Fibak / Kim Warwick defeated Paul Kronk / Cliff Letcher, 7–6, 7–5 [3]
- • It was Fibak's only career Grand Slam doubles title.
- • It was Warwick's 1st career Grand Slam doubles title.
Women's doubles edit
Betsy Nagelsen / Renáta Tomanová defeated 
Naoko Sato / Pam Whytcross, 7–5, 6–2 [4]
- • It was Nagelsen's 1st career Grand Slam doubles title.
- • It was Tomanová's 1st and only career Grand Slam doubles title.