Ireland are set to face Israel at Tallaght Stadium on Monday, October 9th, with kick-off at 3.30pm, after they claimed a point against Norway in a 0-0 draw on Thursday.
Ireland dominated much of the contest against the Norwegians but failed to find the net despite plenty of chances throughout the second-half, but the result saw Ireland stay at the top of Group Five, just ahead of Germany.
Israel are currently fourth in the group but have claimed four points in two games and remain unbeaten during their campaign, and King is expecting a different kind of threat.
The U21s Head Coach said: "We go into the game full of confidence. We did well against Norway and were disappointed not to come out of the game with a win in the end.
"We played really well in patches and created plenty of chances throughout the game so we can use that and go forward into the Israel game tomorrow full of confidence.
"Israel will pose a different kind of threat. They're not as physical as Norway, very technical in their play and we'll have to adjust our approach slightly to face up to that challenge.
"They can give us problems but we can give them problems as well and we can only optimistic going into the game."
Tickets for the game will be available on the day of the game, priced at €10 for adults and €5 for children/students/OAPs. Entry is free for FAI season ticket holders, Shamrock Rovers season ticket holders and IT Tallaght students.
With a number of players vying to breach King's starting XI, the Ireland U21s boss believes the side he puts out will be capable of an all-important victory.
He added: "We've had two elevens the same in the last two games so we'll have to see what happens overnight. We'll name the team before kick-off and whatever team I pick, they'll be capable of getting the job done.
"We've got plenty of threats on the bench to call upon if needed as well. We've been together for nine days and eight nights now so there is one focus, and that is Israel.
"The aim is to get the win of course, to be in a situation with 10 points out of 12 would be great but we can't just talk about, we need to go out there and win it."