A second-string United States team extended its Davis Cup winning streak by dismantling Germany to top Group C in Zhuhai, China, on Saturday after both countries had secured their spots in the quarterfinals.
The 32-time winners were without big names like US Open runner-up Taylor Fritz, Tommy Paul and Frances Tiafoe for the group stage this week but still had plenty of firepower to down Germany and complete a third straight win.
The win assures the United States of a quarterfinal against one of the runners-up from the three other groups taking place this week.
Brandon Nakashima gave the Americans an unassailable 2-0 lead by comfortably beating Maximilian Marterer 6-4, 6-2 in the second singles match of the day before Germany won the doubles clash to hand the Americans their first match loss this week.
"It's been unbelievable this whole week. It's special to be part of this team," said Nakashima, who sealed his third victory in his debut campaign. "To represent the country has always been a dream of mine since I started playing tennis, so I'm super happy that I was able to get three wins on the board for the team."
World No. 309 Reilly Opelka, back on the circuit after hip and wrist surgeries, saved three match points and cranked up his serve when it mattered to beat Henri Squire 6-7 (4), 7-6 (9), 6-3 earlier in the day.
Tim Puetz and Kevin Krawietz beat Rajeev Ram and Austin Krajicek 6-1, 7-6 (4), but U.S. captain Bob Bryan said he was satisfied after a good week that highlighted the team's singles depth.
"We've got a lot of great players in the U.S. right now; you can see it in the rankings. A lot of guys to choose from for the finals," Bryan said. "Hats off to these guys for coming here and carrying us to Malaga. We've got a couple of months to relax and get ready, but it's going to be fun over there. We're looking forward to it."
The top two countries from four groups based in different cities will go through to the knockout stage to be held in Malaga, Spain, in November.
Heavyweights Spain and Australia have also qualified along with the United States and Germany.
Argentina also clinched a berth with a tense 3-0 win over Finland. The result forces Britain to have to beat Canada 3-0 on Sunday to advance at Canada's expense.
Also, Brazil beat Belgium 2-1 after losses to Italy and the Netherlands in Group A.
Information from Reuters was used in this report.