The problem with the Australian Open is that most of the matches take place while you’re asleep. The beauty of the tournament is that you can wake up to exciting late-night tennis. Or, more accurately, early-morning tennis. At the moment, the American teenager Learned Tien is in the fourth set against Daniil Medvedev. It’s 1:29 in the morning in Melbourne. Medvedev looks to win the set, which will send the match into a fifth set that will surely not end before 2 am. I feel sorry for the players, but happy for Tien’s friends waking up in California. Especially if the teenager's legs can hold out.