(Reuters) - Andy Murray\u2019s former coach Alex Corretja said on Saturday that he was indestructible at the height of his career after the Briton announced he would retire this year due to hip problems. FILE PHOTO: Andy Murray of Britain serves the ball Zurich, Switzerland - 10\/04\/2017. REUTERS\/Arnd Wiegmann\/File PhotoThree-time Grand Slam champion Murray held a tearful news conference on Friday saying he planned to bow out at Wimbledon in July if his hip allowed him to play on. The 31-year-old has drawn Corretja\u2019s fellow Spaniard Roberto Bautista Agut, who is the 22nd seed, in the opening round at the Australian Open which starts on Monday. \u201cHe is someone who simply never gets fatigued. Indestructible,\u201d Eurosport analyst Corretja, who worked on and off with Murray from 2008-11, told the broadcaster. \u201cAndy is someone who will fight for everything. He is someone who was always searching for something huge. \u201cEver since I have known him he always wanted to be number one and win Slams. He wanted to do something big for the Davis Cup and did it. He was always someone who challenges himself.\u201d Murray has won three Grand Slam titles \u2014 two at Wimbledon (2013 and 2016) following his first at the U.S. Open in 2012 \u2014 and helped Britain win the Davis Cup in 2015. He has also lost five Australian Open finals and a French Open showpiece. Corretja described Murray\u2019s style as something of a throwback, saying he may have lacked the explosive power of some of the modern generation but knew how to outwit opponents, agreeing with former U.S. Open champion Andy Roddick that he was unrivalled as a tactician. \u201cHe showed that even if tennis has changed a lot and evolved \u2014 people saying you need to hit every ball so hard, you only play for three or four shots and that\u2019s it \u2014 he showed that there is more to tennis than that,\u201d former world number two Corretja said. \u201cIf you are smart, if you are consistent and you know where to place the ball every time then you can be number one and you can win Slams on any surface. He found a nice balance between being defensive and aggressive. \u201cIt was a privilege to see the way he reads a match. I think the way he could adjust to his opponents was one of his greatest assets and strengths.\u201d When Murray does hang up his racket for good, Corretja said the Scot will have a great career behind a microphone. \u201cI would love Andy to be a commentator with me on Eurosport,\u201d he said. \u201cHe would be an amazing commentator. He has got an unbelievable sense of humor.\u201d Reporting by Martyn Herman; Editing by Ken FerrisOur Standards:The Thomson Reuters Trust Principles.