Arsenal boss Mikel Arteta says Eddie Nketiah has a future at the club after he scored to help the Gunners see off Leeds United and reach the Carabao Cup quarter-finals.
Substitute Calum Chambers' header crept over the line seconds of coming off the bench, before former Leeds loanee Nketiah pounced to wrap up the tie.
The forward cleverly flicked the ball over a stranded Illan Meslier and just did enough to nudge it over the line before the visiting keeper could recover.
"I have full belief that he is going to be a top, top player and hopefully at Arsenal," said Arteta, who has helped develop a number of young Arsenal players, including Emile Smith Rowe and Bukayo Saka.
"I'm happy to have him, he is our player, I regard him really highly and from my side I want him to stay."
Leeds had looked the more threatening side until the first goal in an open and entertaining game against a much-changed Arsenal side at Emirates Stadium.
But Arteta's outfit were comfortable after establishing their lead as the visitors became stretched looking for a way back into the game, with Nketiah impressing.Reaction to Tuesday's Carabao Cup action
The 22-year-old, who was linked with a move to Crystal Palace in the summer, was making only his second appearance this term and is out of contract at the end of the season.
"We had a situation in the summer that we tried to resolve and we couldn't either way," said Arteta. "That contract situation is more and more common in football where we are coming from with Covid and a lot of the issues that we have to resolve.
"I have no doubts what he can offer. Whatever you throw at him, he wants more and he demands himself more.
"I'm delighted to see his performance. He totally deserved it. He has other players who play in that position and he has a personal situation but I try to leave that aside."
Arsenal, hoping to win the competition for first time since 1993, will find out their last-eight opponents in Saturday's draw.
Gunners maintain unbeaten runCalum Chambers scored 23 seconds after coming on as a substitute
VAR may not have been in use but Arsenal's opener still felt like it took an age to register as all eyes were fixed on referee Andre Marriner to see whether the ball had crossed the line.
The official glanced at his watch, gave the signal that Chambers' header had squeezed in despite the best efforts of goalkeeper Meslier and the hosts' delayed celebrations began.
Chambers ran to embrace Arsenal's set-piece coach Nicolas Jover, who told the substitute he would score with his first touch of the ball while he was waiting to come on.
Jover was proved correct, just 23 seconds after Chambers entered the field as a replacement for £50m defender Ben White, who had limped off moments earlier.
Arteta said afterwards White was suffering from a bug, having been one of just two players to keep their place following Arsenal's 3-1 win over Aston Villa last Friday, the other being the lively Emile Smith Rowe.
The Arsenal boss called on those coming into the starting XI to use their minutes wisely and young forward Nketiah did that by continuing his prolific form in the competition.
The forward grabbed his seventh goal in eight EFL Cup appearances, two of those coming while on loan at Leeds, when he reacted to a mix up in the visitors' defence to score the second.
"It's always nice to play, it's been a while, I have been working hard, waiting for my opportunity. The most important thing was to get through," he said afterwards.
Arteta has already tasted success at Arsenal, winning the FA Cup as a player and coach, and the recent signs are encouraging for the Spaniard as his side made it eight games without defeat.
Leeds have not won away against Arsenal since 2003 at Highbury and that wait goes on, but they were buoyed by a vocal travelling support and enjoyed the best of the first half.
Gunners goalkeeper Bernd Leno had to get down quickly to palm Jack Harrison's fierce half-volley away and Daniel James proved a constant threat, but Bielsa's focus now returns to the Premier League and a trip to Norwich City on Sunday.
Formation 4-2-3-11Leno17Cédric SoaresBooked at 59mins4WhiteSubstituted forChambersat 55'minutes16HoldingSubstituted forVarela Tavaresat 76'minutes31Kolasinac25ElnenySubstituted forSambi Lokongaat 72'minutes15Maitland-Niles19Pépé10Smith RoweSubstituted forLacazetteat 72'minutes35Martinelli30Nketiah
Substitutes5Partey7Saka9Lacazette20Varela Tavares21Chambers23Sambi Lokonga26Balogun32Ramsdale65Oulad M'hand
Formation 4-2-3-11Meslier37Drameh14LlorenteSubstituted forCooperat 59'minutes21Struijk15Dallas23Phillips4ForshawSubstituted forKlichat 45'minutes22Harrison11RobertsBooked at 23minsSubstituted forGelhardtat 53'minutes20JamesSubstituted forSummervilleat 70'minutes19RodrigoSubstituted forGreenwoodat 70'minutes
Match ends, Arsenal 2, Leeds United 0.
Second Half ends, Arsenal 2, Leeds United 0.
Attempt missed. Joe Gelhardt (Leeds United) left footed shot from the left side of the box misses to the left following a set piece situation.
Attempt blocked. Jack Harrison (Leeds United) left footed shot from outside the box is blocked.
Mateusz Klich (Leeds United) wins a free kick on the right wing.
Foul by Sead Kolasinac (Arsenal).
Foul by Crysencio Summerville (Leeds United).
Sead Kolasinac (Arsenal) wins a free kick in the defensive half.
Attempt missed. Alexandre Lacazette (Arsenal) right footed shot from the right side of the box is high and wide to the left.
Foul by Crysencio Summerville (Leeds United).
Albert Sambi Lokonga (Arsenal) wins a free kick in the defensive half.
Foul by Kalvin Phillips (Leeds United).
Eddie Nketiah (Arsenal) wins a free kick on the left wing.
Foul by Sam Greenwood (Leeds United).
Alexandre Lacazette (Arsenal) wins a free kick in the defensive half.
Substitution, Arsenal. Nuno Tavares replaces Rob Holding because of an injury.
Attempt saved. Sam Greenwood (Leeds United) right footed shot from a difficult angle on the right is saved in the centre of the goal. Assisted by Cody Drameh.
Attempt blocked. Mateusz Klich (Leeds United) right footed shot from outside the box is blocked. Assisted by Crysencio Summerville.
Substitution, Arsenal. Albert Sambi Lokonga replaces Mohamed Elneny.
Substitution, Arsenal. Alexandre Lacazette replaces Emile Smith Rowe.
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