Since then, Hato has become indispensable for Ajax in what has been a hugely testing campaign for the Dutch giants. Amid a backdrop of boardroom chaos and controversy over the signings of sporting director Sven Mislintat - who replaced the disgraced Marc Overmars - their horrendous start to the season saw them drop into the relegation zone in October.
Unsurprisingly, manager Maurice Steijn paid with his job, with John van 't Schip taking over in an interim capacity in October, following a brief caretaker stint from Hedwiges Maduro. Michael Valkanis also had two games in charge when Van 't Schip was away in Australia attending his son's wedding.
Throughout all of this turmoil at the Johan Cruyff ArenA, there's been one constant - Hato. Amazingly, the defender has not missed a single second of his side's season in all competitions, even being handed the captain's armband during an Eredivisie victory over Almere City in November. He then started a Europa League clash against Brighton as skipper the following month.
Speaking after the latter game, Van 't Schip was full of praise for Ajax's youngest-ever captain: "[He's] special in the sense that he has been able to stand his ground for so long and that he continues to reach such a high level. Of course, he is still a young player, the youngest one, who still has a lot to learn, but if you look at what he brings, the way he defends, the way he can play football forward, he has a great future ahead of him."
He also praised Hato's conduct, adding: "We don't have to do a lot because he is an exemplary professional. Of course, he has fun with the boys and that's something that needs to happen because that makes sure you train happily. But he is also a very serious guy in the sense that he trains well, he takes care of himself. Many should see him as an example, especially the players in the youth academy."
In recognition of his prodigious club form, Netherlands boss Ronald Koeman handed him a maiden senior cap against Gibraltar in November. "I was able to assess him better in the training sessions. There he had to defend Wout Weghorst and other attackers. I really liked that. He adapted very easily and plays with bravado. It’s nice that you can let those kinds of boys make their debut," Koeman said after the win.