Andy Murray is OUT of the US Open after losing in straight sets to Grigor Dimitrov in the second round

Andy Murray has been knocked out of the US Open after losing in straight sets to Grigor Dimitrtov in the second round.

He threatened in the first two sets but grew increasingly frustrated as Dimitrov won 6-3, 6-4, 6-1.

It will come as a blow to Murray, who picked up his 200th Grand Slam victory by beating Corentin Moutet in the first round.

More to follow.