There was little to choose between the two as they slugged it out in the first set .
Shvedova 's challenge crumbled after she narrowly lost a tiebreak she had led 5 - 2 .
There was little to choose between the two as they slugged it out in the first set , but Shvedova 's challenge crumbled after she narrowly lost a tiebreak she had led 5 - 2 .