Novak Djokovic has been tipped by Nick Kyrgios to win at least 28 grand slams and become the most successful singles player in tennis history.
The prediction came after 35-year-old Djokovic reached 22 major triumphs on Sunday by landing the Australian Open title for a 10th time.
He now holds a share of the men's singles record with Rafael Nadal, but Djokovic made it clear after his latest big-stage success that he feels capable of collecting many more top-tier trophies.
Kyrgios is ostensibly a rival and was beaten by the Serbian in last year's Wimbledon final, but the Australian has also become one of Djokovic's greatest admirers.
In the wake of Djokovic beating Stefanos Tsitsipas in the Melbourne Park final, Kyrgios posted on Twitter: "Haha I told you. We created a monster. Well done @DjokerNole [Djokovic].
"Sat on my couch and enjoyed the entire show. He will get to 28 slams easy."
Kyrgios was also impressed by Djokovic emerging post-match in a jacket emblazoned with '22', a reminder of when Roger Federer had '15' on his top after winning Wimbledon in 2009 to take the outright lead in the men's grand slam race.
Federer burst past Pete Sampras, who had previously held the record for the most men's singles majors, but Djokovic and Nadal have since overtaken the Swiss, who retired last September after 20 slam successes.
The French Open in May and June could see an almighty tussle for the title as 14-time Roland Garros champion Nadal hunts another victory in Paris, while Djokovic bids to dethrone him and go to 23 singles slams, the same number as Serena Williams won.
Australian Margaret Court won more singles majors than anybody, with 24, but Kyrgios sees Djokovic soon overhauling that number.
Looking at his sartorial choice, Kyrgios saluted Djokovic's audacity, writing: "The jacket with 22 on it is elite energy, haha I love it…. NEED MORE."