Kyle Edmund became the first British male quarter-finalist to make the Australian Open not called Murray in 33 years on Sunday when he produced another magnificent effort to beat Italy's Andreas Seppi.
"He played very well, really picked up the pace in the third and fourth sets", said Seppi, who received treatment in the final set for a right shoulder ailment.
Edmund also fired down 25 aces to tame the neat Italian but it was the thumping winners, particularly off his forehand, that proved decisive after he had reduced the error count that marred his display in the first set.
Last October Edmund started working with Frederick Rosengren, the former coach to Magnus Norman, Robin Soderling and Mario Ancic.
"That's why I'm in the quarterfinals, because every time I step on the court and I'm playing, I believe I'm going to win".
"To play to win, not to play to avoid losing, to have the heart", said Rosengren. Believe you can do it in tough situations, serving out sets and matches. I believe in my game. He is not that exhausted, it's all about the mental thing here to recover. He's reached the fourth round quite a few times, had two five-setters against Nick [Kyrgios], won a five-setter against [Ivo] Karlovic. He is a young man, he knows what he wants and he has a great temper.
"It's always good to see when results come, because that's when it really shows it's paying off". He is doing a great job. "I am very happy".
He was completely in control at the start of the third set, jumping out to a 3-0 lead before allowing Seppi the briefest of respites.
Edmund believes he can win the Australian Open and he knows he has what it takes to beat Dimitrov.
Against Seppi, Edmund had to work hard for his win. The next opponent, I take it one step at a time.
"I thought he actually came out very well and timed the ball well, dictating probably more points than I was".
But slowly Britain's No.2 felt his way into the match and when Seppi played a poor service game at the start of the second set, the tide was starting to turn.
Minutes later he was 3-0 up with a break in the third set and the match had been turned on its head.
The men's singles fourth round begins on day seven of the Australian Open, and with Rafa Nadal and Nick Kyrgios among those in action, our tennis columnist, Dan Weston, is back to check out the value. The world No 3, who recorded the biggest victory of his career when he won the title at the year-end ATP Finals in London in November, beat Edmund in three sets in Washington last summer and was again taken the distance when he beat the world No 49 in Brisbane earlier this month.