Andy Murray continues his quest to reach all four Grand Slam finals in the same year when he takes on a resurgent Grigor Dimitrov for a place in the last eight of the US Open.

The talented Bulgarian has yet to make it past the round of 16 at any Grand Slam since storming into his first major semi-final at Wimbledon in 2014.

His ranking, once in the top 10, plummeted all the way to 40th this summer, not long after he lost his opening match at five straight tournaments.

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It was quite the reversal when he won four times in the same event at Cincinnati shortly before arriving at Flushing Meadows and they all came against players ranked among the top 31 in the world - most notably Stan Wawrinka. Although he wound up losing in three sets in the semi-finals to former US Open champion Marin Cilic, Dimitrov's surge continues.

The 25-year-old, once nicknamed "Baby Fed" for his game's resemblance to that of Roger Federer, is in the round of 16 at a major for the first time since the 2015 Australian Open

"I fell in love with tennis again. It's simple as that," Dimitrov said. "It's not only because I've been winning matches or anything like that. It's because I started to enjoy the process again.

"I'm enjoying the work again. I'm enjoying waking up in the morning early to come to practice. I'm enjoying doing the ice baths again."
Dimitrov beat Murray in the 2014 Wimbledon quarter-finals
He appointed Murray's former coach Dani Vallverdu this summer and the improvement has been notable.

Murray and Vallverdu split in November 2014, five months after the Briton had made Amelie Mauresmo his lead coach.

"We're still getting to know each other. First of all he's a great guy," Dimitrov said of Vallverdu.

"I know how to play tennis. Now it's more the strategic way, how you're going to prepare for big matches, big tournaments.

"So far I think we've been doing a great job. Just simplicity, that's the key right now. Do your stuff, work, go out there, give 100 per cent each match."

"I expect it to be very hard. I'll be ready for that. I'll need to play better than Saturday if I want to win."