Great Britain will seek to build on the successes of 2021 when the new men's tennis season begins with the ATP Cup.
British number one Cameron Norrie, who climbed to world number 12 this year, leads the country at the team event in Sydney, which starts on Saturday.
Barely a month after losing to Germany in another men's team tennis event - the Davis Cup - Great Britain open against those same opponents.
They are in a tough Group C, which also features Canada and the United States.
Norrie faces world number three Alexander Zverev in his first match on Sunday after British number two Dan Evans takes on Jan-Lennard Struff in the opening singles rubber of the best-of-three tie.