1991 Australian Open
Date	14–27 January 1991
Edition	79th
Category	Grand Slam (ITF)
Surface	Hardcourt (Rebound Ace)
Location	Melbourne, Australia
Venue	National Tennis Centre at Flinders Park
Champions
Men's singles
Boris Becker
Women's singles
Monica Seles
Men's doubles
Scott Davis / David Pate
Women's doubles
Patty Fendick / Mary Joe Fernández
Mixed doubles
Jo Durie / Jeremy Bates
Boys' singles
Thomas Enqvist
Girls' singles
Nicole Pratt
Boys' doubles
Grant Doyle / Joshua Eagle
Girls' doubles
Karina Habšudová / Barbara Rittner
← 1990 · Australian Open · 1992 →

The 1991 Australian Open was a tennis tournament played on outdoor hard courts at Flinders Park in Melbourne in Victoria in Australia. It was the 79th edition of the Australian Open and was held from 14 through 27 January 1991.

Seniors

Men's singles

Boris Becker defeated Ivan Lendl 1–6, 6–4, 6–4, 6–4

• It was Becker's 5th career Grand Slam title and his 1st Australian Open title. He became the first male German player to win an Australian Open singles title.

Women's singles

Monica Seles defeated Jana Novotná 5–7, 6–3, 6–1

• It was Seles's 2nd career Grand Slam title and her 1st Australian Open title. She became the only Yugoslav player – male or female – to win a Grand Slam singles title.

Men's doubles

Scott Davis / David Pate defeated Patrick McEnroe / David Wheaton 6–7^(4–7), 7–6^(10–8), 6–3, 7–5

• It was Davis' only career Grand Slam title. It was Pate's only career Grand Slam title.

Women's doubles

Patty Fendick / Mary Joe Fernández defeated Gigi Fernández / Jana Novotná 7–6^(7–4), 6–1

• It was Fendick's only career Grand Slam title. It was Fernandez's 1st career Grand Slam title and her only Australian Open title.

Mixed doubles

Jo Durie / Jeremy Bates defeated Robin White / Scott Davis 2–6, 6–4, 6–4

• It was Durie's 2nd and last career Grand Slam title and her only Australian Open title. It was Bates' 2nd and last career Grand Slam title and his only Australian Open title.

Juniors

Boys' singles

Thomas Enqvist defeated Stephen Gleeson 7–6, 6–7, 6–1

Girls' singles

Nicole Pratt defeated Kristin Godridge 6–4, 6–3

Boys' doubles

Grant Doyle / Joshua Eagle defeated Jamie Holmes / Paul Kilderry 7–6, 6–4

Girls' doubles

Karina Habšudová / Barbara Rittner defeated Joanne Limmer / Angie Woolcock 6–2, 6–0