The Scot arrived in Basel on a career-best 15-match winning streak. Since losing in the U.S. Open semifinals, he has won three successive titles in three weeks in Bangkok, Tokyo and Shanghai.
Murray accepted a wild card to play in Basel for the first time since 2005, and was scheduled to meet Robin Haase of the Netherlands. But following the injury, he was replaced in the draw by Swiss lucky loser Marco Chiudinelli.
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