Britain's Kyle Edmund reached the semi-finals of the boys' singles with a hard-fought 4-6 6-1 6-3 win over Stefan Kozlov of the United States.
The fifth seed was in trouble after losing the first set and being broken at the start of the second with the American controlling the rallies.
But Edmund suddenly began to play much better and reeled off eight games in a row to take control of the match.
In a close final set, Edmund's break in the seventh game proved decisive.
Edmund later reached the quarter-finals of the boys' doubles, as he and Portuguese partner Frederico Ferreira Silva, who are the top seeds, beat unseeded Maximilian Marterer & Lucas Miedler 6-4 6-3.
"It's a nice feeling to be a semi-finalist but ultimately that's not why I'm here," he told BBC Look North. "I want to go further.
"Today's match was very tough, he's a very good player. Those eight games I turned it on and I felt good. I don't know why that was, I lost the first set so I knew I needed to pick something up otherwise I was going out.
"It was good to get the momentum and the third set was very close again and I managed to win the important points, so today's been a successful day and it's nice to get the doubles done without going three sets."
Court Three was disappointingly only half-full when Edmund's match began, but he made a good start as Kozlov, three years younger at 15, found it difficult to cope with his serve.
The Briton squandered a break point in the fourth game and gradually Kozlov started to have the better of things.
He forced three successive Edmund service games to deuce and finally broke to take a 5-4 lead.
The American was playing the better tennis and he closed out the 40-minute first set before breaking Edmund again in the opening game of the second set.
Suddenly though the match changed as Edmund began playing with more freedom and showed some of the form he had displayed in earlier rounds as Kozlov appeared to lose a little belief.
Having broken straight back, Edmund grew in confidence and raced through the second set in just 24 minutes to draw level.
When he broke Kozlov at the start of the decider and then held his serve, he had won eight games in a row and with noisy encouragement from his entourage, which included former Great Britain Davis Cup player and 1997 US Open finalist Greg Rusedski, he seemed set to make short work of the decider.
He had a break point in Kozlov's next service game, but could not take it and his American opponent then broke back.
With the match back in the balance, Kozlov then seemed to suffer an injury as he hit a second serve into the net for a double fault and although he continued after a couple of minutes, he lost the next two points as Edmund broke again to go 4-2 up.
Kozlov moved gingerly after that and only managed to win one point in the final two games as Edmund took the final set in 48 minutes.
The court was almost full by the end and after shaking hands, Edmund returned to the middle to applaud all four stands who backed him fully in a gutsy performance.
Former British number one Greg Rusedski was in the players' box cheering on Edmund and he is optimistic about the teenager's future.
"He works very hard, is very committed to the game and is passionate about playing tennis," he told BBC Look North.
"Every year he keeps on working harder and getting better. Today was a perfect example of that. He was down a set and a break early and found a way to get the job done today and that's what you need as a professional player.
"I see no reason why he shouldn't get to the top 100 and then from there it's 50 and then see where he goes from there.
"Right now he's about 400 in the world in the men's game and he's doing well in the juniors and he's got a very bright future."