Australian tennis greats were upbeat about the 'Demon's' chances of defeating the seven-time champion on Wednesday, but all concurred with former Wimbledon doubles champion Todd Woodbridge's verdict that the Sydneysider will have to pay the "match of his life".
Speaking before the invitational legends' doubles at SW19, Philippoussis, the 2003 finalist, declared: "Of course, he (de Minaur) can beat Djokovic. He's got the game and the mentality to go against anyone.
Mark Philippoussis believes the seven-times Serbian champion thrives on the boos. (Dean Lewins/AAP PHOTOS)
"He's doing everything he has to do, top 10 in the world, playing with confidence, some of the best tennis of his career, having won a grasscourt tournament already this season, and he's continuing to put pressure on the top guys.
"We know the heart he has and the speed he has around the court, but the good thing is, which I believe is a big part of him getting into the top 10, is he's being more aggressive, which he needed to be."
But Philippoussis, now 47, couldn't help smiling as he watched Djokovic, after his win over Holger Rune in Monday's last-16 match, then angrily round on the Dane's fans whom he felt were disrespecting him with their chants.
"I saw a little bit of what happened. I could see him on a change of ends doing something, and I was like, 'okay, something's happening, someone's pissed him off - which is a bad idea. You don't want to piss off Novak!
"I think he wants to hear 'boo', to be honest with you, because it makes him play better. If I were to play him, I would just give him compliments on a change of ends. I don't want to piss that guy off, that's for sure!
"That mentality even towards certain parts of the crowd, to be honest, I love to see that. That's the whole part of what he brings to the table.
"It is just something he uses to his advantage. I am not saying that he needs to, but sometimes you just see in his eyes, when he gets focused and agitated for something, he goes to a different level mentally. He just clicks in and he uses that to play better.
"His confidence is growing with every match. His confidence has also grown with his knee (which required surgery a month ago).
"If you want to win a grand slam, you've got to play the best in the world and beat the best - and this guy is that."
Woodbridge, who won nine Wimbledon men's doubles titles, said: "He's got possibly the best chance he's had in his career to beat one of these big guys in a slam, he really has played some great tennis.
"As Novak tends to do, if he can get himself into tournaments, his level is rising. So Alex is going to have to play the match of his life."
Sam Stosur, the former US Open champion, added: "Alex is playing well enough at the moment that there's going to be opportunities. Look, he is gonna have to play exceptionally well, but there's maybe no better opportunity for him than tomorrow."
