Becker gives Zverev some advice before his match against Djokovic: "He mustn't let himself get distracted".
Alexander Zverev faces Novak Djokovic in the Australian Open semi-finals this Friday.
In comments reported by Tennis365, Boris Becker explained how the German could beat the Serb.
He says: "Sascha has to stick to his game and show his strengths: serving, hitting from the baseline and showing physical strength.
He must not let himself be distracted by the game, whatever his opponent does. If the match lasts too long, Djokovic isn't as strong as he was two or three years ago.
Zverev is known for his physical strength - he's sometimes described as a marathon runner, as he often had to play five sets.
The question is how the first sets will end.
Against Djokovic, it's important to set the pace and take the lead. Because if Djokovic makes you run, then there's no chance."
Australian Open 
