The Australian fast bowler Mitchell Johnson has announced his retirement from all the formats of cricket.Johnson said,”I had hoped to continue playing in various Twenty20 competitions around the world until perhaps the middle of next year. But the fact is my body is starting to shut down. During this year’s Indian Premier League tournament I had a few back problems and that was probably a sign that it was time to move on.“If I can’t play at 100 per cent then I can’t give my best to the team. And for me it’s always been about the team. I’d like to thank the Scorchers for the last two fantastic summers and the WACA for everything my adopted cricket home has done for me over the past decade. Christina Matthews and the team there have always bent over backwards to help me out.”“A huge thank you to the fans as well. I will never forget the atmosphere at the WACA Ground or the smiling faces of the kids. My competitive urge hasn’t left me and hopefully, that’s something I can use to channel into a coaching or mentoring role in the future. I’m a believer in sticking to your strengths and cricket is my strength,” he added.