Shane Tusup, the husband and coach of Hungarian swimmer Katinka Hosszu, made headlines around the world thanks to his euphoric celebration of his wife’s 400m individual medley win.
Katinka 27, who calls herself the Iron Lady, won gold in the final and broke the previous world record set by China's Ye Shiwen at London 2012 – and images and footage of her ecstatic husband cheering and fist pumping pool side soon went viral.
That moment, along with a recent New York Times profile on the couple, has put their relationship in the spotlight however, and questions have been raised about Shane's behaviour.
An NBC announcer alluded to the rumours during Sunday’s broadcast, saying: "The influence he's had on her… it can be very, very harsh. In fact, it's been a little disturbing to other swimmers who've observed it. And Hosszu admits that."
Jessica Hardy, an Olympic medallist who used to train with Katinka, was one such swimmer. "I've seen a lot of inappropriate and not-OK behaviour in Shane," she has said. "I've seen coaches exhibit that kind of behaviour in training, but this is another level, it's scary."