Following are reactions to
Rafael Nadal winning a men's record 21st Grand Slam title after defeating Russian Daniil Medvedev 2-6, 6-7(5), 6-4, 6-4, 7-5 in the Australian Open men's singles final on Sunday.
NADAL"It was one of the most emotional matches in my tennis career. I don't know what to say. For me, it's just amazing.
"Being honest, one month and a half ago, I did not know if I will be able to back on the tour and play tennis again.
"And today, in front of all of you (the crowd), having this trophy with me... you really don't know how much I fought to be here."
ROGER FEDERER, 20-TIME GRAND SLAM WINNER"What a match! To my friend and great rival, Rafael Nadal. Heartfelt congratulations on becoming the first man to win 21 Grand Slam singles titles.
"A few months ago we were joking about both being on crutches. Amazing. Never underestimate a great champion. Your incredible work ethic, dedication and fighting spirit are an inspiration to me and countless others around the world.
"I am proud to share this era with you and honoured to play a role in pushing you to achieve more. As you have done for me for the past 18 years.
"I am sure you have more achievements ahead but for now enjoy this one!"
MEDVEDEV"It was insane. The level was very high. You (Nadal) raised your level after two sets... I thought you are going to get tired, maybe just a little, but you won the match.
"You're an amazing champion and I think you guys (Roger Federer, Novak Djokovic and Nadal) have a good rivalry still. It's not over yet.
"Congratulations, it was unbelievable."
ROD LAVER, AUSTRALIAN TENNIS GREAT"Two AO (Australian Open) crowns and 21 majors, given everything you have endured this historic victory is so special Rafa.
"It has been a privilege to watch you doing what you love. Congratulations."
MATS WILANDER, SEVEN-TIME GRAND SLAM WINNER"To me this is the best comeback in the Open era, winning the 21st Grand Slam title, 35 years old, being 36 when the French Open comes around and he beats the best player in the world in Daniil Medvedev.
"... It is indescribable and I do not know where he finds that strength."
TIM HENMAN, FORMER MEN'S WORLD NUMBER FOUR"I can't quite get my head around it given the last six months for Rafa having not played much coming into this event and all the circumstances he faced prior to the tournament.
"The resilience, he was down two sets to love, I thought he was cooked and he finds a way to keep on fighting and coming back.
"We thought the younger guy and the longer match was going to play into Medvedev's hands, it was just incredible to see."