Boris Becker says he can't rule out him coaching Alexander Zverev in the future, although for now it is not a possibility.
Becker has worked with Zverev before but only on a part-time basis within his role with the German Tennis Federation.
Zverev lost coach David Ferrer earlier this month, with the Spaniard opting to return home, and he has turned to his father and brother Mischa in the meantime.
"As of today, I can't imagine whether I will coach him again as a full-time coach," Becker, who previously coached Novak Djokovic, told Eurosport.
"Because of the pandemic, there are more important issues for me at the moment than becoming a coach.
"At the moment, I see Zverev as the only German who can win a Grand Slam tournament.
"That's why: never say never. But as of today, the question doesn't arise."
Zverev reached his first Grand Slam final just a few months ago, and Becker believes he must be counted among the front runner to win the Australian Open.
"He is one of the favourites in the tournament," he said. "I would be very wrong if he doesn't get very far in the tournament.
"He's getting into his best tennis age. He knows that the responsibility is on him. The time for excuses is over."
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