The experienced defender will have a cheer squad consisting of his parents, uncles and aunties, and one or two cousins among the expected crowd of 10,000.
But no-one will barrack louder than Sigmund's biggest fan, his 84-year-old grandfather Jerry Sigmund, whose voice will echo off the stadium roof if his grandson scores a goal or (perhaps more likely) completes a trademark thunderous tackle.
Ben Sigmund (30) knows he has "loads" of relatives in Dunedin but do not ask him to name them all.
"The closest person is my Granddad. We talk once or twice a week and catch up," he told the Otago Daily Times.
"He's sort of followed me all round the country, and I think he's been desperate for us to come and play in his own backyard."
Jerry Sigmund's story - he was detained as a political prisoner during World War 2, and escaped communist Czechoslovakia in 1948 - featured in the media during last year's World Cup.
Now there is another generation. Ben became a father in May last year, when son Cameron arrived nearly 16 weeks early. Cameron, like his father and grandfather, is a brave little scrapper.
"It's been tough the last couple of months. He was born so early, so his immune system is not that great," Sigmund said.
"He picked up a cold and then another bug. It knocked him around a bit and he's been up all night. My wife, Deanna, is certainly earning her keep at the moment.
"We love him to bits and he's a happy little boy. He's a champion. Even when he's crook, he just smiles and claps his hands."
There are obvious parallels to be drawn between the Sigmund generations.
"What Granddad went through is a remarkable story. He's passed that fighting spirit to all of us, I think. I'm pretty proud of that."
Sigmund's father, Tony, lived and played football in Dunedin. He and Sigmund's mother, Ngaire, now live in Christchurch but will be down for tonight's game.
Sigmund is a Blenheim-born, Wellington-domiciled Cantabrian. He's also something of a late bloomer, which he puts down to simple maturity.
"For a while there, I thought I could be a party boy and just have a good time. I needed to change some habits.
"I got to 24-25 and knew I had one last crack at becoming a professional. It all happened really quickly."
Sigmund was flourishing in a job with a Christchurch paper company. But the same week he got offered a promotion, the Phoenix came calling.
"I spoke to my boss and he encouraged me to do it. So I gave football a crack."
The football choice is working out fine. Sigmund made it to the World Cup with the All Whites, and was named Phoenix player of the year last season.
