Novak Djokovic faces Alexander Zverev in the semi-finals of the Australian Open, with the Serb's bid for a record 25th Grand Slam title picking up steam at just the right time.

Now, the 23-year-old Italian is preparing for a semifinal battle against Ben Shelton, a rising American star. Shelton, the 21st seed, has had an impressive run at Melbourne Park, making it to his ...