It was a magnificent full-circle – or full-oval speed skating track – moment for Fontana.
She also won her first Olympic medal at a home Games – Turin 2006 – as a 15-year-old, also in the 3000m relay.
“I had no idea what was happening!” Fontana told the BBC’s More Than The Score podcast last week of that 2006 bronze in the 3000m relay.
“I was just living the dream. I was too young to really understand what it meant to be on the Olympic podium. Then when I went home, I had my whole hometown waiting for me.
“I am fortunate to have a home Olympics, because in Turin I couldn’t really understand. To be home in Milan, it is my home region.”
While an unknown teenager in Turin, she is one of the faces of this year’s Games 20 years on. Fontana carried the Italian flag at the opening ceremony at San Siro, leading the home nation as tens of thousands of compatriots cheered in the crowd.
It was the second time Fontana was honoured to be the opening ceremony flagbearer, having also carried the flag at Pyeongchang 2018.
On how she has kept winning Olympic medals and maintained her place at the top end of speed skating since before Instagram was invented, Fontana says it comes down to a love of the sport – and a love of herself.
Speaking ahead of her most recent success, she added: “I do have experience, but I have the same drive I did when I was 15. I never get on the ice just to show up.
“With time, I have been able to understand my body, and my mental fitness – I have taken more time off from racing, more breaks, because mentally it can be tough.
“Elite athletes, we put pressure on ourselves easily, we have high expectation and it can be hard mentally.”