This year’s tennis season has kicked off with the Grand Slam in Australia. Last year, the winner of the men’s singles title was Novak Djokovic, while the women’s championship was won by Aryna Sabalenka. Both are set to defend their titles this year, but it will be a challenging fight. Djokovic has already won the Australian Open 10 times in his career and is the clear favourite of the tournament. However, Italian-born Jannik Sinner also has a big appetite for victory. Sabalenko’s prominent opponent will be Chinese player Qinwen Zheng, whom she will face in the tournament’s final. When is the A…