Interestingly, Groningen hold a percentage of any resale for Antuna, who has signed a two-year deal with City.
"We were looking for speed and depth," said technical manager Peter Jeltema to Voetbal International.
"With Antuna we found that. We had him in sight for a long time, as well as Manchester City, they signed him this summer and we can loan him. You can say that we have acted jointly in this case."