The Scot is the 46th player in the Open era with 500 or more wins and the first British player to accomplish this feat.
“It’s nice I think obviously for me the fact that it happened here,” said the two-time Miami Open champion. “It’s just fitting just because I have spent so much time training here and working to get better and to improve. That was nice.
“Yeah, I hope I’ve still got a lot more wins in me. To get to 500 is good. It’s not an easy thing to do at my age. It’s nice. Hopefully I can keep going.”
“I hope for me this isn’t the end and I can keep trying to progress,” he added. With each win you get closer to going past a great player.
“You know, the people that are ahead of me have all done pretty amazing things in the sport, so that’s what’s nice about it. And, yeah, it gives me ‑‑ also feels like it gives me motivation, as well, for some reason.
“I don’t know why, but getting to 500, yeah, it gives me motivation to go on and try and win more. When you look at the list of players and the wins that certain guys have got, it gives you something to aim at, as well.”
No. 3 seed Murray will face off against 21-year-old Dominic Thiem, who reached his first Masters 1000 quarterfinal with a win over No. 28 Adrian Mannarino 7-6 (5), 4-6, 7-5.
“He had his best year on the tour last year,” Murray said. “He’s a very talented guy. He’s strong. I know him fairly well. I practice with him quite a bit. He’s very hard worker. Very good attitude. Very respectful guy. He’s got a very good career ahead of him.
“So I expect tomorrow will be a tough match. He struggled a little bit the beginning part of the year. He changed racquets. “You know, always takes a few months to get used to that. Obviously this week he’s played very well again.”
Also advancing to the quarterfinals were No. 1 Novak Djokovic, No. 4 Kei Nishikori, No. 6 David Ferrer, No. 8 Tomas Berdych, and Juan Monaco.
Djokovic survived a test from Alexandr Dolgopolov 6-7, 7-5, 6-0. Dolgopolov was a point a way from a 7-6, 4-0 lead. Berdych advanced when Gael Monfils retired from the match with a hip injury in the second set.