"I'm not sure what Ricki's plans are and the personnel he and the new owners want to bring in," Greenacre said. "I have said to Ricki that if he needs me again he can count on me. I have left that in his court. Whatever capacity you want me, I will give it 110 per cent."
It's the type of attitude that has seen the Phoenix climb to second on the A-League table. They aren't doing cartwheels yet, knowing they could slip to fourth this weekend with a defeat to Brisbane in Wellington, but their resoluteness has been as important to success as Ifill's wizardry.
They have a difficult run-in with two matches against runaway leaders Central Coast as well as next month's Melbourne (Victory and Heart) double-header in Victoria and they tackle third-placed Brisbane in Wellington on Sunday.
"It's massive, absolutely massive," Greenacre said of the Brisbane game. "What they've achieved and the way they play, it's going to be a difficult day for us.
"It's all about results and not performances. We just have to make sure that on every day we're at our best and if we do that we give ourselves a chance. That's the only way we'll be successful."
Vince Lia will come in at right-back for the suspended Manny Muscat but otherwise the side will remain the same as the one that beat Adelaide 2-1 last weekend to record their fourth-straight win and third on the road.
Herbert doesn't have a lot of depth to call on but he has an extremely settled starting side who he's getting the best out of.
Brisbane, who looked unbeatable earlier in the season in their pursuit of consecutive A-league titles, have suffered an extended lean patch but beat Central Coast 2-0 away from home last weekend.
Greenacre will start again to keep his perfect record for the season intact. His vintage has seen him granted an extra day off from training than his teammates and it has helped him stay hungry and injury-free.
"It's been a surprise to everyone [that I've played every game] but I've thoroughly enjoyed it," said Greenacre, who plans to gain New Zealand citizenship and stay for the medium term. "You don't want your playing days to end and I'm no different. It's been fantastic, especially as it's been a good year, and to know I've played a big part is humbling."