Andy Murray has expressed his delight after a "big" win against John Isner at the Cincinnati Masters.
Murray, 27, beat the American after dropping the first set and facing two match points in the third set.
Murray told Sky Sports News: "It was a big win for me. He plays extremely well here.
"Returning his serve, especially his second serve, in these conditions is very challenging so I did well to fight back."
The Scot progressed after beating Isner 6-7 6-4 7-6 in America on Thursday.
Murray has won 28 career titles and is currently ranked ninth in the world.
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