Blacktown City and FFA Cup hero Danny Choi has admitted contract talks have begun between himself and A-League champions Adelaide United, but until Choi gets a visa he'll have to stay in Sydney.

Choi burst onto the scene after scoring a 70-metre wonder goal in Blacktown's 6-2 win over Sydney United 58 in the FFA Cup Round of 32.

The 22-year-old also made a massive impact over the weekend in the NSW NPL Grand Final against United, scoring a fantastic double to help City to a 3-0 win.

After plenty of impressive performances from Choi all season, Adelaide have come hunting, while several other clubs are monitoring the attacker.

โ€œIt is true that Adelaide have approached me, but at this time I don't have a visa yet so we can't process anything further," Choi said.

"We'll see how it goes but I haven't signed with Adelaide yet.

โ€œI saw Graham Arnold come (to the Grand Final) and I guess he was just seeing our performance and our game ahead the FFA Cup game next week. But no words have been spoken to me (from Sydney FC) yet.โ€

Blacktown City will face Sydney FC in the FFA Cup quarter-finals next Wednesday night, and while City are the underdogs, Choi isn't ruling out an upset.

โ€œFootball is a game where you can't really expect what is going to happen, it's just in that split second that things happen. So I'll try my best next Wednesday and play as a team and prove something to the people of Australia,โ€ Choi said.