Alexander Zverev rallied from a set down to beat dangerous Canadian Denis Shapovalov and open his season with a fighting victory in the ATP Cup, while in-form Matteo Berrettini steered Italy into the semi-finals on Wednesday. The seventh-ranked German had to dig deep for his 6-7 (5/7), 6-3, 7-6 (7/4) win to seal the tie, but gained valuable court time ahead of another crack at a first Grand Slam trophy at the Australian Open starting next week. Zverev, who fell agonisingly short in the US Open final last year to Dominic Thiem, said having his brother Mischa as team captain had helped him. "All the players enjoy having him as captain, he`s been fantastic in training as well. It`s just great to have him here," he said. Germany`s Jan-Lennard Struff upset Milos Raonic 7-6 (7/4), 7-6 (7/2) in the opening match and Canada are now out after a second narrow loss for Shapovalov, who pushed Novak Djokovic hard in their Group A clash on Tuesday. Djokovic`s defending champions beat Canada 2-1 in their opener on Tuesday and will play Germany on Thursday for a place in the semis.

Berrettini delivers

Italy became the first nation into the last four by beating France to follow their opening win against Austria in Group C. Fabio Fognini won just five games in his ATP Cup opener on Tuesday against Denis Novak, but bounced back to battle past Benoit Paire 6-1, 7-6 (7/2) and give Italy a 1-0 lead. Berrettini, tipped by Djokovic as among the new generation capable of winning a Grand Slam, clinched the tie with a comfortable 6-4, 6-2 victory over Gael Monfils, ranked a place below him at 11. "I was ready for any score. I kept going," said Berrettini, who recovered from going down an early break in the first set. "I thought about my weapons and that`s how I won the match.