Is this the worst shot of Andy Murray’s season?

Andy Murray may be one of the world's best tennis players - he is after all the current Wimbledon, US Open and Olympic champion - but he is still prone to the occasional on-court gaffe.

During his 6-7 6-1 6-4 6-4 US Open fourth-round win over Russia's Denis Istomin, the world number two appeared to have taken control of a point with a superb volleyed lob that sent his opponent scuttling to the baseline.

To his credit, the eccentric Istomin managed to pull off a stunning trick shot, but his reply arrived nicely for Murray to bury a routine smash away from his stranded opponent.

Cue a quite remarkable fail from the British number one who, right up against the net and with the court at his mercy, somehow managed to completely mis-hit his volley at a 180 degree angle.

The ball plopped just to his right, giving the effect of the kind of shot a park player would be ashamed of fluffing. Istomin found it hilarious, Murray less so.

Murray probably took his eye off the ball. Whatever the reasons for this error, it has to go down as his worst shot of the season.

It didn't matter in the grand scheme of things - Murray was 5-1 up in the second set and went on to win the match fairly comfortably.