Tsitsipas back in groove as Zverev searches for answers

Greece's Stefanos Tsitsipas was clinical as he picked up his first win of the season at the ATP Cup in Brisbane on Sunday against a temperamental Alexander Zverev of Germany, who was almost reduced to tears due to problems over his serve. Nick Kyrgios' late withdrawal due to a back problem did not stop Australia from defeating Canada, as the hosts became the first to seal a quarter-final spot with their second 3-0 win in the inaugural team event. Australia had beaten Germany in their opening tie and qualified for the Final Eight stage in Sydney as Group F winners after Germany beat Greece 2-1 in the evening session.