TOKYO (AP) — Andy Murray opened the defense of his Japan Open title by beating Ivo Karlovic of Croatia 7-6 (7), 6-4 in the first round on Tuesday.
Murray withstood 17 aces from Karlovic at Ariake Colosseum.
Gael Monfils of France, who was scheduled to be Murray's opponent, withdrew with a right knee injury he aggravated in Beijing last week, and was replaced by lucky loser Karlovic. Monfils is returning to Paris to have his knee examined.
Despite having break points in the first and seventh games, Murray was unable to capitalize.
Playing for the first time since winning the U.S. Open last month, Murray admitted it was not easy against the towering Karlovic.
"Playing against him you know it is going to be uncomfortable," Murray said. "He is a tricky player."
Murray, who bested Karlovic in the first round at Wimbledon, serve three consecutive aces in the eighth game to level at 4-4.
With both players unable to break serve, Murray finally prevailed 9-7 in the tiebreak with a forehand passing shot down the line, after saving a set point when he was down 7-6.
Karlovic, who had 12 aces in the set, squandered a chance to go up 6-3 in the tiebreak when he double-faulted.
Murray, who won the gold medal at the London Olympics, took an injury timeout following the first set after appearing to injure his back early in the match.
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