Alexander Zverev has proven himself as the best of tennis' new generation of men's players following his maiden ATP Finals triumph where he beat Roger Federer and Novak Djokovic in consecutive days, German great Boris Becker has said.

Alexander Zverev winning the ATP Finals is a moment which the whole tennis world has been waiting for, says Boris Becker.

Alexander Zverev winning the ATP Finals is a moment which the whole tennis world has been waiting for, says Boris Becker.

Boris Becker, Tim Henman and Serena Williams' coach Patrick Mouratoglou assess whether Novak Djokovic can challenge to be best male player of all time.