Giải quần vợt Mỹ Mở rộng 1970 – Đơn nữ

Margaret Court
| runner = Rosie Casals
| score = 6–2, 2–6, 6–1
| draw = 64
| seeds = 8
| before_name = Giải quần vợt Mỹ Mở rộng – Đơn nữ
| after_name = Giải quần vợt Mỹ Mở rộng – Đơn nữ
}}

Margaret Court là đương kim vô địch, và bảo vệ danh hiệu thành công khi đánh bại Rosie Casals trong trận chung kết, 6–2, 2–6, 6–1, giành chức vô địch Đơn nữ tại Giải quần vợt Mỹ Mở rộng 1970. Đây là danh hiệu Mỹ Mở rộng thứ 4 liên tiếp, danh hiệu Grand Slam thứ 5 liên tiếp title và Grand Slam thứ 20 tổng cộng của Court. Với việc giữ 4 danh hiệu cùng một lúc, Court trở thành tay vợt nữ đầu tiên trong Kỉ nguyên Mở hoàn tất một Grand Slam.

Hạt giống
Margaret Court (Vô địch)
Rosie Casals (Chung kết)
Nancy Richey (Bán kết)
Françoise Dürr (Tứ kết)
Virginia Wade (Bán kết)
Kerry Melville (Tứ kết)
Karen Krantzcke (Rút lui trước khi giải khởi tranh)
Judy Dalton (Vòng ba)
}}

Kết quả

Chung kết
Margaret Court
| RD3-seed1=1
| RD3-team2= Rosie Casals
| RD3-seed2=2
| RD3-score1-1=6
| RD3-score2-1=2
| RD3-score1-2=2
| RD3-score2-2=6
| RD3-score1-3=6
| RD3-score2-3=1
| RD2-team1= Margaret Court
| RD2-seed1=1
| RD2-team2= Nancy Richey
| RD2-seed2=3
| RD2-score1-1=6
| RD2-score2-1=1
| RD2-score1-2=6
| RD2-score2-2=3
| RD2-team3= Virginia Wade
| RD2-seed3=5
| RD2-team4= Rosie Casals
| RD2-seed4=2
| RD2-score3-1=2
| RD2-score4-1=6
| RD2-score3-2=7
| RD2-score4-2=6
| RD2-score3-3=2
| RD2-score4-3=6
| RD1-team1= Margaret Court
| RD1-seed1=1
| RD1-team2= Helen Gourlay
| RD1-seed2=&nbsp;
| RD1-score1-1=6
| RD1-score2-1=2
| RD1-score1-2=6
| RD1-score2-2=2
| RD1-team3= Nancy Richey
| RD1-seed3=3
| RD1-team4= Lesley Hunt
| RD1-seed4=&nbsp;
| RD1-score3-1=6
| RD1-score4-1=4
| RD1-score3-2=6
| RD1-score4-2=4
| RD1-team5= Virginia Wade
| RD1-seed5=5
| RD1-team6= Françoise Dürr
| RD1-seed6=4
| RD1-score5-1=5
| RD1-score6-1=7
| RD1-score5-2=6
| RD1-score6-2=4
| RD1-score5-3=6
| RD1-score6-3=0
| RD1-team7= Kerry Melville
| RD1-seed7=6
| RD1-team8= Rosie Casals
| RD1-seed8=2
| RD1-score7-1=4
| RD1-score8-1=6
| RD1-score7-2=6
| RD1-score8-2=4
| RD1-score7-3=4
| RD1-score8-3=6
}}

Nửa trên

Nhánh 1
M Court
| RD4-seed01=1
| RD4-team02= H Gourlay
| RD4-seed02=
| RD4-score01-1=6
| RD4-score02-1=2
| RD4-score01-2=6
| RD4-score02-2=2
| RD3-team01= M Court
| RD3-seed01=1
| RD3-team02= T Faulkner
| RD3-seed02=
| RD3-score01-1=6
| RD3-score02-1=0
| RD3-score01-2=6
| RD3-score02-2=2
| RD3-team03= H Gourlay
| RD3-seed03=
| RD3-team04= J Dalton
| RD3-seed04=8
| RD3-score03-1=6
| RD3-score04-1=4
| RD3-score03-2=6
| RD3-score04-2=2
| RD2-team01= M Court
| RD2-seed01=1
| RD2-team02= P Hogan
| RD2-seed02=
| RD2-score01-1=6
| RD2-score02-1=1
| RD2-score01-2=6
| RD2-score02-2=1
| RD2-team03= T Faulkner
| RD2-seed03=
| RD2-team04= M Gengler
| RD2-seed04=
| RD2-score03-1=6
| RD2-score04-1=3
| RD2-score03-2=6
| RD2-score04-2=4
| RD2-team05= H Gourlay
| RD2-seed05=
| RD2-team06= C Graebner
| RD2-seed06=
| RD2-score05-1=6
| RD2-score06-1=3
| RD2-score05-2=7
| RD2-score06-2=5
| RD2-team07= K Pigeon
| RD2-seed07=
| RD2-team08= J Dalton
| RD2-seed08=8
| RD2-score07-1=6
| RD2-score08-1=7
| RD2-score07-2=6
| RD2-score08-2=0
| RD2-score07-3=4
| RD2-score08-3=6
| RD1-team01= M Court
| RD1-seed01=1
| RD1-team02= P Austin
| RD1-seed02=
| RD1-score01-1=6
| RD1-score02-1=1
| RD1-score01-2=6
| RD1-score02-2=0
| RD1-team03= P Hogan
| RD1-seed03=
| RD1-team04= J Newberry
| RD1-seed04=
| RD1-score03-1=7
| RD1-score04-1=5
| RD1-score03-2=3
| RD1-score04-2=6
| RD1-score03-3=6
| RD1-score04-3=1
| RD1-team05= T Faulkner
| RD1-seed05=
| RD1-team06= C Murakami
| RD1-seed06=
| RD1-score05-1=6
| RD1-score06-1=2
| RD1-score05-2=5
| RD1-score06-2=7
| RD1-score05-3=6
| RD1-score06-3=4
| RD1-team07= P Stewart
| RD1-seed07=
| RD1-team08= M Gengler
| RD1-seed08=
| RD1-score07-1=6
| RD1-score08-1=3
| RD1-score07-2=2
| RD1-score08-2=6
| RD1-score07-3=0
| RD1-score08-3=6
| RD1-team09= M Cooper
| RD1-seed09=
| RD1-team10= H Gourlay
| RD1-seed10=
| RD1-score09-1=4
| RD1-score10-1=6
| RD1-score09-2=2
| RD1-score10-2=6
| RD1-team11= C Graebner
| RD1-seed11=
| RD1-team12= L Tenney
| RD1-seed12=
| RD1-score11-1=6
| RD1-score12-1=2
| RD1-score11-2=6
| RD1-score12-2=3
| RD1-team13= B-A Hansen
| RD1-seed13=
| RD1-team14= K Pigeon
| RD1-seed14=
| RD1-score13-1=5
| RD1-score14-1=7
| RD1-score13-2=4
| RD1-score14-2=6
| RD1-team15= P Reese
| RD1-seed15=
| RD1-team16= J Dalton
| RD1-seed16=8
| RD1-score15-1=1
| RD1-score16-1=6
| RD1-score15-2=2
| RD1-score16-2=6
}}

Nhánh 2
N Richey
| RD4-seed01=3
| RD4-team02= L Hunt
| RD4-seed02=
| RD4-score01-1=6
| RD4-score02-1=4
| RD4-score01-2=6
| RD4-score02-2=4
| RD3-team01= N Richey
| RD3-seed01=3
| RD3-team02= O Morozova
| RD3-seed02=
| RD3-score01-1=7
| RD3-score02-1=5
| RD3-score01-2=2
| RD3-score02-2=6
| RD3-score01-3=6
| RD3-score02-3=2
| RD3-team03= C Sandberg
| RD3-seed03=
| RD3-team04= L Hunt
| RD3-seed04=
| RD3-score03-1=4
| RD3-score04-1=6
| RD3-score03-2=3
| RD3-score04-2=6
| RD2-team01= N Richey
| RD2-seed01=3
| RD2-team02= G Chanfreau
| RD2-seed02=
| RD2-score01-1=6
| RD2-score02-1=3
| RD2-score01-2=6
| RD2-score02-2=3
| RD2-team03= S Johnson
| RD2-seed03=
| RD2-team04= O Morozova
| RD2-seed04=
| RD2-score03-1=1
| RD2-score04-1=6
| RD2-score03-2=3
| RD2-score04-2=6
| RD2-team05= C Sandberg
| RD2-seed05=
| RD2-team06= C Capozzi
| RD2-seed06=
| RD2-score05-1=6
| RD2-score06-1=2
| RD2-score05-2=6
| RD2-score06-2=2
| RD2-team07= L Hunt
| RD2-seed07=
| RD2-team08= P Cody
| RD2-seed08=
| RD2-score07-1=6
| RD2-score08-1=1
| RD2-score07-2=6
| RD2-score08-2=3
| RD1-team01= N Richey
| RD1-seed01=3
| RD1-team02= L duPont
| RD1-seed02=
| RD1-score01-1=6
| RD1-score02-1=2
| RD1-score01-2=6
| RD1-score02-2=3
| RD1-team03= G Chanfreau
| RD1-seed03=
| RD1-team04= D Carter
| RD1-seed04=
| RD1-score03-1=6
| RD1-score04-1=3
| RD1-score03-2=3
| RD1-score04-2=6
| RD1-score03-3=6
| RD1-score04-3=3
| RD1-team05= S Holdsworth
| RD1-seed05=
| RD1-team06= S Johnson
| RD1-seed06=
| RD1-score05-1=1
| RD1-score06-1=6
| RD1-score05-2=5
| RD1-score06-2=7
| RD1-team07= L Liem
| RD1-seed07=
| RD1-team08= O Morozova
| RD1-seed08=
| RD1-score07-1=7
| RD1-score08-1=5
| RD1-score07-2=4
| RD1-score08-2=6
| RD1-score07-3=1
| RD1-score08-3=6
| RD1-team09= M Rodríguez
| RD1-seed09=
| RD1-team10= C Sandberg
| RD1-seed10=
| RD1-score10-1=w
| RD1-score10-2=/
| RD1-score10-3=o
| RD1-team11= M-E Guzman
| RD1-seed11=
| RD1-team12= C Capozzi
| RD1-seed12=
| RD1-score12-1=w
| RD1-score12-2=/
| RD1-score12-3=o
| RD1-team13= L Hunt
| RD1-seed13=
| RD1-team14= K Kemmer
| RD1-seed14=
| RD1-score13-1=6
| RD1-score14-1=3
| RD1-score13-2=6
| RD1-score14-2=1
| RD1-team15= P Farmer
| RD1-seed15=
| RD1-team16= P Cody
| RD1-seed16=
| RD1-score16-1=w
| RD1-score16-2=/
| RD1-score16-3=o
}}

Nửa dưới

Nhánh 3
V Wade
| RD4-seed01=5
| RD4-team02= Dürr
| RD4-seed02=4
| RD4-score01-1=5
| RD4-score02-1=7
| RD4-score01-2=6
| RD4-score02-2=4
| RD4-score01-3=6
| RD4-score02-3=0
| RD3-team01= V Wade
| RD3-seed01=5
| RD3-team02= S Walsh
| RD3-seed02=
| RD3-score01-1=3
| RD3-score02-1=6
| RD3-score01-2=7
| RD3-score02-2=6
| RD3-score01-3=1
| RD3-score02-3=6
| RD3-team03= J O'Hara
| RD3-seed03=
| RD3-team04= Dürr
| RD3-seed04=4
| RD3-score03-1=1
| RD3-score04-1=6
| RD3-score03-2=1
| RD3-score04-2=6
| RD2-team01= V Wade
| RD2-seed01=5
| RD2-team02= P Bartkowicz
| RD2-seed02=
| RD2-score01-1=7
| RD2-score02-1=6
| RD2-score01-2=6
| RD2-score02-2=1
| RD2-team03= D Hard
| RD2-seed03=
| RD2-team04= S Walsh
| RD2-seed04=
| RD2-score03-1=6
| RD2-score04-1=3
| RD2-score03-2=1
| RD2-score04-2=6
| RD2-score03-3=5
| RD2-score04-3=7
| RD2-team05= F Footman
| RD2-seed05=
| RD2-team06= J O'Hara
| RD2-seed06=
| RD2-score05-1=6
| RD2-score06-1=7
| RD2-score05-2=6
| RD2-score06-2=7
| RD2-team07= N Truman
| RD2-seed07=
| RD2-team08= Dürr
| RD2-seed08=4
| RD2-score07-1=1
| RD2-score08-1=6
| RD2-score07-2=0
| RD2-score08-2=6
| RD1-team01= V Wade
| RD1-seed01=5
| RD1-team02= T O'Shaughnessy
| RD1-seed02=
| RD1-score01-1=6
| RD1-score02-1=1
| RD1-score01-2=6
| RD1-score02-2=1
| RD1-team03= I Bentzer
| RD1-seed03=
| RD1-team04= P Bartkowicz
| RD1-seed04=
| RD1-score03-1=2
| RD1-score04-1=6
| RD1-score03-2=2
| RD1-score04-2=6
| RD1-team05= D Hard
| RD1-seed05=
| RD1-team06= V Ziegenfuss
| RD1-seed06=
| RD1-score05-1=3
| RD1-score06-1=6
| RD1-score05-2=6
| RD1-score06-2=4
| RD1-score05-3=6
| RD1-score06-3=4
| RD1-team07= S Walsh
| RD1-seed07=
| RD1-team08= E Emanuel
| RD1-seed08=
| RD1-score07-1=6
| RD1-score08-1=1
| RD1-score07-2=4
| RD1-score08-2=6
| RD1-score07-3=6
| RD1-score08-3=2
| RD1-team09= M Struthers
| RD1-seed09=
| RD1-team10= F Footman
| RD1-seed10=
| RD1-score09-1=4
| RD1-score10-1=6
| RD1-score09-2=6
| RD1-score10-2=4
| RD1-score09-3=2
| RD1-score10-3=6
| RD1-team11= J O'Hara
| RD1-seed11=
| RD1-team12= L Kaligis
| RD1-seed12=
| RD1-score11-1=6
| RD1-score12-1=7
| RD1-score11-2=6
| RD1-score12-2=2
| RD1-score11-3=6
| RD1-score12-3=3
| RD1-team13= N Truman
| RD1-seed13=
| RD1-team14= S Vinton
| RD1-seed14=
| RD1-score13-1=6
| RD1-score14-1=2
| RD1-score13-2=6
| RD1-score14-2=0
| RD1-team15= M-A Curtis
| RD1-seed15=
| RD1-team16= Dürr
| RD1-seed16=4
| RD1-score15-1=5
| RD1-score16-1=7
| RD1-score15-2=0
| RD1-score16-2=6
}}

Nhánh 4
K Melville
| RD4-seed01=6
| RD4-team02= R Casals
| RD4-seed02=2
| RD4-score01-1=4
| RD4-score02-1=6
| RD4-score01-2=6
| RD4-score02-2=4
| RD4-score01-3=4
| RD4-score02-3=6
| RD3-team01= K Melville
| RD3-seed01=6
| RD3-team02= P Walkden
| RD3-seed02=
| RD3-score01-1=7
| RD3-score02-1=6
| RD3-score01-2=7
| RD3-score02-2=5
| RD3-team03= P Teeguarden
| RD3-seed03=
| RD3-team04= R Casals
| RD3-seed04=2
| RD3-score03-1=5
| RD3-score04-1=7
| RD3-score03-2=4
| RD3-score04-2=6
| RD2-team01= K Melville
| RD2-seed01=6
| RD2-team02= S Stap
| RD2-seed02=
| RD2-score01-1=6
| RD2-score02-1=4
| RD2-score01-2=7
| RD2-score02-2=5
| RD2-team03= P Walkden
| RD2-seed03=
| RD2-team04= E Pande
| RD2-seed04=
| RD2-score03-1=6
| RD2-score04-1=4
| RD2-score03-2=6
| RD2-score04-2=1
| RD2-team05= P Teeguarden
| RD2-seed05=
| RD2-team06= K Harter
| RD2-seed06=
| RD2-score05-1=6
| RD2-score06-1=1
| RD2-score05-2=6
| RD2-score06-2=4
| RD2-team07= C Martinez
| RD2-seed07=
| RD2-team08= R Casals
| RD2-seed08=2
| RD2-score07-1=0
| RD2-score08-1=6
| RD2-score07-2=3
| RD2-score08-2=6
| RD1-team01= K Melville
| RD1-seed01=6
| RD1-team02= B Vest
| RD1-seed02=
| RD1-score01-1=6
| RD1-score02-1=2
| RD1-score01-2=6
| RD1-score02-2=2
| RD1-team03= S Stap
| RD1-seed03=
| RD1-team04= S Barman
| RD1-seed04=
| RD1-score03-1=6
| RD1-score04-1=0
| RD1-score03-2=6
| RD1-score04-2=1
| RD1-team05= L Tuero
| RD1-seed05=
| RD1-team06= P Walkden
| RD1-seed06=
| RD1-score05-1=5
| RD1-score06-1=7
| RD1-score05-2=6
| RD1-score06-2=3
| RD1-score05-3=5
| RD1-score06-3=7
| RD1-team07= E Pande
| RD1-seed07=
| RD1-team08= C Molesworth
| RD1-seed08=
| RD1-score07-1=6
| RD1-score08-1=4
| RD1-score07-2=6
| RD1-score08-2=3
| RD1-team09= P Teeguarden
| RD1-seed09=
| RD1-team10= K Harris
| RD1-seed10=
| RD1-score09-1=6
| RD1-score10-1=1
| RD1-score09-2=6
| RD1-score10-2=2
| RD1-team11= G Hansen
| RD1-seed11=
| RD1-team12= K Harter
| RD1-seed12=
| RD1-score11-1=5
| RD1-score12-1=7
| RD1-score11-2=4
| RD1-score12-2=6
| RD1-team13= M Kroschina
| RD1-seed13=
| RD1-team14= C Martinez
| RD1-seed14=
| RD1-score13-1=3
| RD1-score14-1=6
| RD1-score13-2=4
| RD1-score14-2=6
| RD1-team15= C Spinoza
| RD1-seed15=
| RD1-team16= R Casals
| RD1-seed16=2
| RD1-score15-1=3
| RD1-score16-1=6
| RD1-score15-2=0
| RD1-score16-2=6
}}

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