Now, though, reports suggest the Eredivisie club has upped their asking price for the star, raising their demands from £67million to £84million [€100m].
The Brazilian winger has been on the Dutchman's transfer wish list ever since he left Ajax for Man United this summer, but the deal has faced some stumbling blocks.
Reports suggest Ajax are reluctant to let go of their star man - who scored ten goals and recorded 12 assists last season under Ten Hag - and required a fee of £67m to even consider a deal.
It remains to be seen whether Man United talisman Cristiano Ronaldo will be off the wage bill or not this upcoming season, but the uncertainty over the superstar has ultimately shaped the Red Devils' desire to spend big on Antony.
Then, United were given hope when Ajax technical manager Gerry Hamstra provided an update on the Amsterdam outfit's preparation for the new campaign.
"We want to keep this group together. I assume that no one leaves this core anymore," he explained to Voetbal International.
Before adding: "Of course you can never say never, I have learned that by now."
However, not long after Ajax offered Ten Hag a slither of hope, this transfer tale endured another twist.
It's now understood the Eredivisie champions are putting up a fight against Ten Hag further raiding his old side, and have upped their asking price to £84m for Antony - essentially blocking his exit to Old Trafford.
The Dutchman has already pinched Lisandro Martinez from his former club, with the Argentine defender joining full-back Tyrell Malacia and midfielder Christian Eriksen at United this summer.
The pursuit for Antony marks another increasingly complicated transfer deal, alongside United's ongoing chase for Barcelona's Frenkie de Jong.