Freya Ross has surrendered her place at the Commonwealth Games after suffering a hip injury.
The long-distance runner had been selected by Team Scotland last month, with the rest of the team to be named this week.
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The 30-year-old was Britain's best performer in the marathon at London 2012 and her absence from Glasgow this summer follows the decision of compatriot Lee McConnell to retire earlier this year.
"It is with regret and deep disappointment that I can confirm I have had to withdraw from Team Scotland for the Commonwealth games," said Ross. "I have suffered from a hip injury for the past few weeks and while the prognosis is good for a full return to competitive running, it is affecting my training.
"It is a difficult decision but one which has been taken in consultation with my coach, Steve Jones, scottishathletics, the sportscotland institute of sport support staff and Commonwealth Games Scotland. I would like to offer my support to every athlete in every sport involved for Glasgow 2014."