The Yorkshire-based player, who is ranked inside the world's top 400, was forced to come from a set down to defeat America's Stefan Kozlov 4-6, 6-1, 6-3 in front of a near-capacity crowd on No.3 Court.
Enjoying his best run in the junior event at Wimbledon to date, Edmund had to dig deep and utilise all of his reserves to restore parity at one set all against an opponent, who at 15, is three years younger than the Briton.
The teenagers traded breaks at the start of a crucial third set, and as is so often the case, it was the seventh game that ultimately ended up deciding the outcome of the match.
At 0-30 down, Kozlov experienced cramp and paused for a minute before he served, but it appeared as though the wind had been taken out of his sails. Edmund took advantage, broke to love and then held comfortably in the following game.
The British No.13, who currently holds junior doubles titles at the US Open and French Open, then broke the Macedonian-born player's service again to take the set 6-3 and the match.
"It was a tough match. I didn't feel comfortable (being down a set) and I knew that I had to change something, but luckily enough I found some form and really built up my confidence. It was a good match to come through, it's another win and another step closer," said Edmund, who lost to Polish giant, and Andy Murray's semi-final opponent, Jerzy Janowicz in the first round at Wimbledon last week.
The No.5 seed now faces No.6 seed Gianluigi Quinzi of Italy in the semi-finals, after his win over Serbia's Nikola Milojevic.
20:08It brings me no pleasure but it's time to bring the curtain down for another year. Seemed somehow appropriate to leave the last word to Roger Federer. Thanks a billion for reading. What a fortnight, what a final, fast forward to 2015 please...
20:03"I already have seven. It's not like I need another one. But it would have been awfully nice to have it. I think that's what the feeling was of the people, and I felt that... I know they love tennis. They love tennis after we're all gone."View all