Nick Kyrgios has given a taste of what’s to come from him as an Australian Open commentator by taking aim at Pat Cash, Boris Becker and John McEnroe. Kyrgios confirmed last month that he wouldn’t be back in time to play at the Australian Open, but he will be at the major in some capacity throughout. Kyrgios used Becker’s time in jail during their war of words online and branded the tennis icon a “doughnut”. But the 28-year-old is embracing the possible tension between himself and Becker if they end up working together. “For the sport and for Eurosport, I actually think it’s really good because…