Alexander Zverev has beaten Australia's Nick Kyrgios 6-2, 7-6 (3), 6-2 in the first reverse singles Sunday to advance Germany to the Davis Cup World Group quarterfinals.
Germany went into Sunday's play leading 2-1 after a doubles win Saturday. A fifth best-of-three singles match was to be played later Sunday.
The fifth-ranked Zverev says: "It's an amazing feeling, hopefully this is just the beginning for us."
No. 14-ranked Kyrgios looked frustrated from the start of the match on hard courts at Pat Rafter Arena, and required a second-set medical timeout to receive treatment on his right arm.
On Saturday, Tim Puetz and late call-up Jan-Lennard Struff gave Germany the 2-1 lead, beating Matt Ebden and John Peers 6-4, 6-7 (1), 6-2, 6-7 (4), 6-4.
On Friday, Zverev gave Germany a 1-0 lead with a 7-5, 4-6, 4-6, 6-3, 7-6 (4) win over Alex de Minaur before Kyrgios leveled for Australia with a 6-4, 6-4, 6-4 win over Struff.
Germany will play either Britain or Spain in the quarterfinals from April 6-8.
Australia will contest September's World Group playoffs.