'This guy has a heart of gold': Tennis world reacts to Andy Murray announcement

Andy Murray has announced his intention to retire from tennis during 2019.

The 31-year-old, who has been battling a chronic hip condition, plans to finish after Wimbledon but has said next week's Australian Open could be the final tournament of his career.

Here, Press Association Sport looks at reaction to Murray's decision.

"You are a champion on and off the court. So sorry you cannot retire on your own terms, but remember to look to the future. Your greatest impact on the world may be yet to come. Your voice for equality will inspire future generations. Much love to you and your family." - Billie Jean King, a winner of 12 grand slam singles titles

"You don't know how much we are going to miss you, Andy Murray! You are an example of a great athlete and person." - Spanish tennis player Rafael Nadal

"I just can't imagine the sport without him to be honest, he has been there all the time. Everyone has a lot of compassion and a lot of sadness for him." - British number one Johanna Konta

"Andy Murray is our best British tennis player in the Open era. He is one of the best athletes, tactician & competitor to grace our sport. He should be so proud of his incredible career." - Former British number one Greg Rusedski

"All my admiration and respect Andy Murray. You'll always be a great champion , those of you who love tennis will miss you." - Former world number one Juan Carlos Ferrero, who won the 2003 French Open

"You are one crazy tennis player - miles better than me - but I just want you to know that today isn't only a sad day for you and your team, it's a sad day for the sport and for everyone you've had an impact on." - Australian tennis player Nick Kyrgios

"You were my biggest idol growing up and now I'm lucky enough to call you my mentor." - British tennis player Katie Swan

"We'll all forever remember the mark he left on our sport...but I'll also never forget the afternoon he carved out of his busy training schedule to help raise money for our kids foundation. This guy has a heart of gold and will always be a legend in tennis and life." - American player Bob Bryan, a winner of 16 grand slam doubles titles

"Keep fighting Andy, you're got a heart of pure gold! You're most definitely one of the most liked and respected players on the tour. I know all of us girls in the locker room are in awe and so grateful for how you always fight in our corner! It's pretty nerve racking playing with you because you're pretty gosh darn Awesome (with a capital A)." - British tennis player Heather Watson

"Andy Murray has had an incredible career. Most importantly though, he's such a decent human being." - Retired British tennis player Anne Keothavong

"Woke up to the sad news from Andy Murray - true champion and an amazing fighter with a huge heart. One of the most professional guys that I have ever met. My biggest respect!" - Retired Swedish player Jonas Bjorkman

"Favourite Andy moment? Being asked if I'd enjoyed it after he had just smoked me in front of 18,000 people. Privilege to know you." - British tennis player Liam Broady