美国队第三日两场单打皆墨，遭到大逆转，无缘晋级。
CROATIA defeated USA 3-2
Venue: Tualatin Hills Tennis Center, Portland, USA (hard - outdoor)
Jack Sock (USA) d. Marin Cilic (CRO) 46 36 63 64 64
John Isner (USA) d. Borna Coric (CRO) 64 64 63
Ivan Dodig/Marin Cilic (CRO) d. Bob Bryan/Mike Bryan (USA) 62 26 62 64
Marin Cilic (CRO) d. John Isner (USA) 76(9) 63 64
Borna Coric (CRO) d. Jack Sock (USA) 64 36 63 64
※ 引述《kour (FedEx Express!)》之铭言：
: Bryans意外落败，美国队仍然以2:1暂时领先。
: USA leads CROATIA 2-1
: Venue: Tualatin Hills Tennis Center, Portland, USA (hard - outdoor)
: Jack Sock (USA) d. Marin Cilic (CRO) 46 36 63 64 64
: John Isner (USA) d. Borna Coric (CRO) 64 64 63
: Ivan Dodig/Marin Cilic (CRO) d. Bob Bryan/Mike Bryan (USA) 62 26 62 64
: John Isner (USA) v Marin Cilic (CRO)
: Jack Sock (USA) v Borna Coric (CRO)
: ※ 引述《kour (FedEx Express!)》之铭言：
: : USA leads CROATIA 2-0
: : Venue: Tualatin Hills Tennis Center, Portland, USA (hard - outdoor)
: : Jack Sock (USA) d. Marin Cilic (CRO) 46 36 63 64 64
: : John Isner (USA) d. Borna Coric (CRO) 64 64 63
: : Bob Bryan/Mike Bryan (USA) v Ivan Dodig/Marin Draganja (CRO)
: : John Isner (USA) v Marin Cilic (CRO)
: : Jack Sock (USA) v Borna Coric (CRO)
: : Sock 输二赢三大逆转打败Cilic，Isner dominated Coric。
: : 美国队拿下头两点单打，距离晋级只差一步！