Andy Murray will miss the tournament after testing positive for Covid-19 shortly before being due to fly to Melbourne.The incredible athletes who do take part will be cheered on by reduced crowds, with 17,922 fans watching on Monday, down from 64,387 on the same day at the previous year's tournament.Also cheering them on will be their glamorous WAGs.Vanessa, 26, shot to fame on Love Island Australia and went public over her relationship with tennis star Bernard Tomic back in November last