Laura Robson battles past Samantha Crawford

British number three Laura Robson has beaten American Samantha Crawford in straight sets to reach to the second round of the US Open.

The 18-year-old Olympic silver medallist broke her opponent's serve twice to take the opening set 6-3 on Court Four.

She then came out on top in a gruelling tie-break, which she won 8-6, at the end of an ultra-tight second set.

Next up for Robson is a match against three-time champion Kim Clijsters, who plans to retire following the tournament.