British number one Andy Murray thrashed America's Donald Young 6-4 6-2 in their second-round match at the Miami Masters - but only after a mid-match wobble.

Murray raced into a 4-0 lead in the opening set, and looked likely to double-bagel his opponent. But a combination of Murray errors on serve and some grit from Young saw the tables turned, with the Scot allowing his opponent to break back and get into the set. Murray dug in to hold and close out the first set, then upped his game to claim the match in straight sets - with his first serve in particular improving in the second set, going from finding the box less than 50% to over 65%.

"It was extremely hard," Murray explained afterwards.

"It was ridiculously windy, the ball was swirling around all over the place and changing direction during your serve so that makes it tough on your ball toss.

"It was very tricky and I just tried to play how I normally do in the wind - to use some variety and make it tricky for him and it worked."

Murray is looking for his 10th Masters 1000 title and his third trophy in Miami, having won in 2009 and 2013.

Key Biscayne is something of a 'home court' for Murray who practices at the venue during his off-season preparation in Miami.

"I spend hours, hundreds and hundreds of hours practicing on that court. Each week, when I am here, I would practice 14 hours at least on that court. Over the last seven, eight years, I have spent a lot of time on it," he said.

Murray, the third seed, will face Santiago Giraldo in the next round, the Colombian 27th seed having beaten Robin Haase 7-6(4) 4-6 6-3.

Winning

Rafael Nadal is also through after defeating fellow Spaniard Nicolas Almagro 6-4 6-2 in 89 minutes in windy conditions as he began his campaign to finally win the Miami tournament where he has lost in the final on three occasions.

"In general I thought I played a solid match. I played well, I had good movement," said Nadal.

"I had to put the balls in and play with no mistakes -- that was the idea with very tough conditions. Almagros was not an easy opponent."

Tomas Berdych is safely through after beating Chung Hyeon of South Korea 6-3 6-4, but Spain's Feliciano Lopez was the highest seed go out, losing to Austria's Dominic Thiem 7-6(4) 4-6 6-3. World number one Novak Djokovic gets his campaign under way against Slovak Marin Klizan on Saturday.

RESULTS

Dominic Thiem (Austria) beat 10-Feliciano Lopez (Spain) 7-6(4) 4-6 6-3

27-Santiago Giraldo (Colombia) beat Robin Haase (Netherlands) 6-2 3-6 6-0

24-Leonardo Mayer (Argentina) beat Jarkko Nieminen (Finland) 6-4 7-6(5)

3-Andy Murray (Britain) beat Donald Young (U.S.) 6-4 6-2

23-Guillermo Garcia-Lopez (Spain) beat Jan-Lennard Struff (Germany) 6-4 6-4

15-Kevin Anderson (South Africa) beat Sam Querrey (U.S.) 6-7(5) 7-6(3) 6-4

29-Bernard Tomic (Australia) beat Austin Krajicek (U.S.) 7-6(6) 7-5

8-Tomas Berdych (Czech Republic) beat Chung Hyeon (South Korea) 6-3 6-4

2-Rafael Nadal (Spain) beat Nicolas Almagro (Spain) 6-4 6-2

6-Stan Wawrinka (Switzerland) beat Carlos Berlocq (Argentina) 6-7 7-5 6-2

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