The 21-year old has enjoyed a successful stint with the club since crossing from Fijian club Labasa FC and after scoring twice in the New Zealand Football Championship semi-final win over Wellington, thanked his teammates for helping him with his game.
Krishna will move after Sunday’s final against Auckland City but is keen to take out the Championship first.
"It's been great playing for Waitakere United,” he said.
"My team mates have helped improve my game immensely.
"I have enjoyed every minute of my time here.
"Rex Dawkins, the chairman of Waitakere United, is handling all my enquires and he tells me there is interest from the Phoenix and one other A League club in Australia," he added.
"I don't want that to interfere just yet with the NZFC and O League finals.
"I am not making any commitment for football back in Fiji as I'm still under contract.”
However, Waitakere coach Chris Milicich believes he could be heading for the US.
He's very quick and powerful and while he's not the biggest player in the world but he genuinely knows how to score," Milicich told au.fourfourtwo.com.
"And in all my years as a coach, I've never seen someone hit a ball as hard as he does. There is interest in Roy but most of the A-League seem to be looking off-shore, such as Europe.