Jurgen Klopp singled out Republic of Ireland Under-21 international Caoimhin Kelleher for praise after the 20-year-old impressed on his full Liverpool debut at MK Dons on Wednesday night.
The Corkman was assured all night and made one terrific reflex stop to keep the hosts at bay in a 2-0 Carabao Cup third-round win that set up a last-16 showdown with Arsenal at Anfield.
Whether Kelleher starts in that game remains to be seen but he did his prospects no harm with a confident showing.
"Kelleher, to be honest, these games are there so the boys show how good they are," Klopp told LFC TV afterwards.
"For a goalie, it's quite difficult in a game like this but then being there having not a lot to do over the whole game and then having these kind of saves, that's absolutely brilliant, so I'm happy about that as well."
Klopp had praise for the old as well as the new after his much-changed side eased through.
The German altered his entire starting line-up from Sunday's win at Chelsea as Harvey Elliott became the youngest player to start a competitive match for the club.
The 16-year-old put in an accomplished display and twice hit the crossbar as James Milner profited from terrible goalkeeping from Stuart Moore to put the Reds in front before young defender Ki-Jana Hoever - who played for the Netherlands at Tallaght Stadium last May in the European Under-17 Championship final - wrapped up a comfortable win with his first goal for the club.
While there were plenty of positives to take from the youngsters, Klopp was delighted with the performance from evergreen Milner as the 33-year-old set an example for his precocious team-mates to follow.
"This man is on fire," Klopp replied when asked about Milner's contribution.
"This is how it is, it is good. It helps a lot and he is a real role model for young players. If we could play every day he would be like this every day - that is how it is.
"The team had a lack of experience and a lack of rhythm and the player with the most experience and rhythm was the best player tonight.
"We were here to win the game, no other reason, so I am so happy we went through, that is cool."
At the other end of the career spectrum, Elliott also impressed on his record-breaking Liverpool debut.
"Sixteen years old still and this kind of footballer, it is good for us," added Klopp.
"(He is) a brilliant boy, takes the situation really well, wants to learn and he will always be a special player in moments but his overall game is really, really good.
"He was a bit unlucky otherwise he would have scored, he is a good player but they are all good, we have no bad young players and that is why it is important we can give them these matches and try to continue like this."
