Mixed doubles
1970 US Open
Final
Champions	Marty Riessen Margaret Court
Runners-up	Frew McMillan Judy Dalton
Score	6–4, 6–4
Details
Draw	34
Seeds	4
Events
Singles men women boys girls Doubles men women mixed boys girls WC Singles men women quad WC Doubles men women quad Legends men women mixed
← 1969 · US Open · 1971 →

Marty Riessen andMargaret Court were the defending champions and successfully defended their title, defeatingFrew McMillan andJudy Dalton 6–4, 6–4 in the final.^[1]

This was the first edition to feature a tie-break. It was used a sudden-death tie-break in all sets, winning the first to reach 5 points.

Key

	Quarterfinals							Semifinals							Final
	1	Marty Riessen Margaret Court	7	3	6
		Tom Gorman Denise Carter	5	6	2
								1	Marty Riessen Margaret Court	6	6	6
								4	Dennis Ralston Françoise Dürr	3	7	3
	4	Dennis Ralston Françoise Dürr	6	6
		Bob Carmichael Gail Chanfreau	3	1
															1	Marty Riessen Margaret Court	6	6
															3	Frew McMillan Judy Dalton	4	4
		Cliff Richey Nancy Richey	1	3
	3	Frew McMillan Judy Dalton	6	6
								3	Frew McMillan Judy Dalton	7	6
									Roger Taylor Nell Truman	5	3
		Owen Davidson Rosie Casals	6	6
		Roger Taylor Nell Truman	7	7

	First round							Second round							Third round							Quarterfinals
								1	M Riessen M Court	7	6
									B Howe D Hard	6	0
															1	M Riessen M Court	6	6
																L Miller M-A Curtis	2	2
									L Miller M-A Curtis	6	6
									G Taylor B-A Hansen	3	4
																						1	M Riessen M Court	7	3	6
																							T Gorman D Carter	5	6	2
									P Guzmán E Emmanuel	5	6	6
									O Bengtson C Sandberg	7	3	4
																P Guzmán E Emmanuel	4	1
																T Gorman D Carter	6	6
									D Dell I Bentzer	2	5
									T Gorman D Carter	6	7

	First round							Second round							Third round							Quarterfinals
								4	D Ralston F Dürr	6	3	7
									P Cornejo P Teeguarden	3	6	5
															4	D Ralston F Dürr	6	7
																E Scott C Martinez	2	6
									S Ross P Bartkowicz	4	4
									E Scott C Martinez	6	6
																						4	D Ralston F Dürr	6	6
																							B Carmichael G Chanfreau	3	1
									B Carmichael G Chanfreau	6	6
									B Salembier P Hogan	3	0
																B Carmichael G Chanfreau	w/o
																D Crealy K Melville
									R Ruffels V Wade	3	7	6
		K Stuart K Harris	2	3					D Crealy K Melville	6	6	7
		D Crealy K Melville	6	6

	First round							Second round							Third round							Quarterfinals
		J-B Chanfreau L Hunt	6	6
		V Korotkov M Kroschina	2	3					J-B Chanfreau L Hunt	4	6	5
									R Russell S Holdsworth	6	3	7
																R Russell S Holdsworth
																C Richey N Richey	w/o
									C Richey N Richey	6	6
									P Fishbach M Aschner	2	4
																							C Richey N Richey	1	3
																						3	F McMillan J Dalton	6	6
									A Stone P Walkden	6	7
									A Olmedo K Kemmer	2	6
																A Stone P Walkden	3	5
															3	F McMillan J Dalton	6	7
									M Machette S Walsh	6	1	1
								3	F McMillan J Dalton	4	6	6

	First round							Second round							Third round							Quarterfinals
									F Stolle H Gourlay	4	1
									B Fairlie K Pigeon	6	6
																B Fairlie K Pigeon	2	6
																O Davidson R Casals	6	7
									O Davidson R Casals	6	6
									MA Ilahi P Stewart	0	1
																							O Davidson R Casals	6	6
																							R Taylor N Truman	7	7
									J Fillol K Harter	7	6
									P Curtis S Johnson	6	4
																J Fillol K Harter	5	4
																R Taylor N Truman	7	6
									R Taylor N Truman	7	6
								2	A Metreveli O Morozova	5	2

• 1970 US Open – Doubles draws and results at theInternational Tennis Federation

• 1970 US Open (tennis)
• US Open (tennis) by year – Mixed doubles

• Use mdy dates from January 2025
• Articles with short description
• Short description matches Wikidata