The Spaniard had caused an upset when he defeated the world number one in the third round in Monte-Carlo last week, and he looked poised for a repeat.
But Ramos-Vinolas missed a chance to serve for the match and it was Murray who came through after two hours and 59 minutes.

Andy Murray

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Murray, who has never reached the final in Barcelona, was forced to dig deep after being broken twice in an error-strewn first set, where his first-serve percentage was down at 35%.
The 29-year-old then saved three break points in the ninth game of the second set before taking it to a decider after capitalising on his first break-point opportunity in the 10th.
After both dropping serve early in the final set, world number 19 Ramos-Vinolas had the chance to serve for the match after breaking the Scot in the ninth game, but Murray showed his mettle to break back immediately and take it to 5-5.
A tie-break soon followed, and Murray raced to a 4-0 lead before clinching it 7-4.
Murray will now face Dominic Thiem for a place in the final after the Austrian fourth seed cruised past Japanese world number 91 Yuichi Sugita 6-1 6-2 to reach the last four.
Defending champion Rafael Nadal’s was made to work against South Korean 20-year-old Hyeon Chung, but prevailed 7-6(1) 6-2 to reach the semis.
Standing in between Nadal and a final spot is Horacio Zeballos, who comfortably beat Karen Khachanov 6-4 6-1 in the late game.
Nadal is chasing his 10th title in Barcelona as he gears up for the French Open, where he has not won since 2014.

QUARTER-FINAL RESULTS

Dominic Thiem (Aut) beat Yuichi Sugita (Jpn) 6-1 6-2
Andy Murray (Gbr) beat Albert Ramos-Vinolas (Spa) 2-6 6-4 7-6
Rafael Nadal (Spa) beat Hyeon Chung (Kor) 7-6(1) 6-2
Horacio Zeballos (Arg) beat Karen Khachanov (Rus) 6-4 6-1
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