The tennis ace may be licking his wounds after suffering an embarrassing loss, but there is another sport he might be able to fall back on Dumped out of the Australian Open, tennis’ first major tournament of the season, it might be time for Novak Djokovic to consider a career change. The Serb lost his world number one ranking to Andy Murray at the end of 2016 and is destined to fall further behind the Scot after being dumped out of the competition in Melbourne by Denis Istomin, who is not considered one of the best 100 players in the game.