Great Britain got off to a great start in Sydney last Sunday, with Dan Evans inspiring the side to a 2-1 victory over Germany by first winning his singles match against Jan-Lennard Struff and then assisting Jamie Murray to win in straight sets in the doubles.
It was only British No.1 Cameron Norrie who faltered in the first match, and he was beaten again in Tuesday's match against Canada, losing 7-6(4) 6-3 to Felix Auger-Aliassime.
The Canadian is ranked one higher than Norrie as world No.11, and his narrow win managed to level the scores after Dan Evans won the opener against Denis Shapovolov 6-4 6-4.
Evans put on another impressive performance to upset the odds and defeat the No.14 ranked Shapovolov, who appeared on court for the first time this tournament after pulling out of Canda's match with USA due to his ongoing recovery from COVID-19.
With the scores neatly poised at 1-1, it left the doubles match-up as the crucial decider, and despite Britain' doubles specialists Jamie Murray and Joe Salisbury taking to the court, Canada's pairing of Auger-Aliassime and Shapovalov strolled to a 6-4 6-1 win.
The result means that both Britain and Canada now sit on one win and one loss, and their record is matched by both Germany and USA in Group C after Struff and Alexander Zverev inspired the former to a 2-1 win in their match.
Britain now face a must-win match against USA on Thursday. Dan Evans will take on John Isner, while Cameron Norrie will take on Taylor Fritz in the singles, while the doubles pairings are yet to be announced.
The winner of each group is joined in the quarter-finals by the two best second-placed teams, and then three rounds of knock-out matches follow with the final on January 9 to decide the tournament's winners.