He limped off after a crunching tackle against Poland U21s, but fortunately the problem was not as bad as at first feared.
"It is getting better; I ran yesterday and am training so I will try and get back as quickly as possible," he says.
"The England doctor said he thought I had cracked something in my fibula and asked me to go on the stretcher, but I said I didn't want to - I just wanted to hobble off.
"He was 'moaning' at me to get on it because he thought it was serious but luckily it wasn't.
"That night I didn't sleep at all as I was eager to know what was wrong with me and when the news came through that it wasn't broken I had a big sigh of relief.
"It wasn't a great challenge but it is one of those things that happens in football and you just have to take it on the chin.
"It came at a bad time but things happen for a reason and hopefully I can come back stronger."
Since being out, he has seen two new centre half arrivals - and welcomes the competition.
"I have just played with Calum when we were with the U21s and Malky is an experienced player, so I can only learn," he says.
"If Calum stays until the end of the season it can only increase our chances of going up, and he is very good in the air.
"He is comfortable on the ball, calm, and collected - and he can pass the ball as well."
Despite the injury, Anton is pleased with the start he has made and adds:
"For me it has been good; I have started to play the position I love and hopefully I can play there for the rest of the season."
Not only will Anton be back in action soon, brother Rio returns from his eight month suspension for inadvertently missing a drugs test.
"I am very excited for him and he is buzzing, to be fair; he is all right, fully focused, and he has got a job to do - that is the way he sees it," he says.
"It will be good to see him back and people will know what they have missed; it might take two games because eight months out is a long time but if he plays on Monday and gets match fit he will soon be back to his best.
"Fans say to me 'I can't wait to see your brother back in a Man United and an England shirt'.
"Obviously they would like to see him in a West Ham shirt one day again, which could happen.
"He does appreciate those West Ham fans that have sent him letters."