With Rafael Nadal nervously cheering courtside after winning his match earlier Sunday, David Ferrer sealed Spain's 3-2 comeback win over Germany in the Davis Cup quarterfinals with a thrilling five-set victory against Philipp Kohlschreiber.
Nadal was dominant against the 20-year-old German to earn his 24th straight win since 2005, the most in Davis Cup history combining singles and doubles.
Nadal was swiftly back into the swing of things in Valencia, dismantling Kohlschreiber after Alexander Zverev blew away David Ferrer 6-4 6-2 6-2 to put Germany in front.
Elsewhere, defending champion France booked a home semifinal against Spain as Lucas Pouille claimed a hard-fought win over Fabio Fognini in Genoa to give the visitors a 3-1 victory in the tie.
Kohlschreiber also went down tamely in the second before putting up more of a fight at the start of the third. But Nadal kept up his end of the bargain on Sunday and the 36-year-old Ferrer showed all of his trademark never-say-die qualities to keep Spain's hopes of a sixth Davis Cup title alive. "I'm very happy with my level, the first set was fantastic in such an important match. It's always special to play in these arenas", said Nadal on his return. "I feel good when I return to the clay courts".
Sock and Harrison failed to break serve until the fourth set yet managed to see off doubles specialists Sander Gille and Joran Vliegen 5-7 7-6 (1) 7-6 (3) 6-4 to wrap up the tie in the fewest possible matches for the Americans. "18 months ago, he was playing for the first time, and now he is our leader on and off the court", captain Noah said of Pouille.
But then world number 92 Mikhail Kukushkin demonstrated the spirit and determination of this Kazhak team as he brought the scores level with victory over Borna Ćorić, 3-6, 7-6, 6-4, 6-2.
"It's positive, winning in straight sets".
The U.S. are at home to Belgium in Nashville in the other quarter-final, with John Isner due to take on Joris de Loore in the opening singles rubber at 2100 GMT.
In Nashville, John Isner and Sam Querrey lifted the Americans a 2-0 lead over last year's runners-up Belgium as the USA tries to reach the semis for the first time in six years.