Rafael Nadal has got the defence of his Madrid Open title off to a winning start with a straight-sets victory over Steve Johnson.
The Spaniard was made to work hard during the match before eventually coming through 6-4 6-3 in 75 minutes.
There was little to separate the pair at the start of the opening set, but Nadal eventually forced a break of serve on his way to closing it out 6-4.
It was a similar story in the second as American world number 54 Johnson dug in his heels against the four-time champion.
However, Nadal broke to take a 4-3 lead before seeing off Johnson to set up a last-16 clash with Italy's Simone Bolelli.
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