The Chelsea playmaker is beginning to rediscover his absolute best at Euro2016 culminating in a match-winning performance in the 4-0 victory over Hungary in the Round of 16.
Regarding the Red Devils captain, Tottenham defender Alderweireld has labelled Hazard a class act in the lead-up to the quarter-final clash with Wales on Friday.
"His confidence is growing, he's working hard to show what he can do and help the team and he was fantastic," said the centre-half.
"When he plays like he did today he's one of the best players in the world – he can compete with anyone.
"Hopefully he can keep this level up in this tournament."
Regarding Hazard's captaincy, in the absence of Vincent Kompany, Alderweireld added: "It's more what he does during the game.
"When something important happens he will come and say something, but not as much as Kompany."