Andy Murray crashed out at the first stage of the defence of his Sony Ericsson Open title in Miami on Saturday when he was beaten in straight sets by the world number 101 Mardy Fish.
Murray, who had received a first-round bye, produced a performance plagued with errors to fall 6-4 6-4 to an American opponent whom he had beaten comfortably in each of their previous three meetings.
And following swiftly on the back of a disappointing quarter-final loss to Robin Soderling in Indian Wells last week, it is a result that is sure to make Murray re-evaluate his 2010 campaign.
All seemed well for Murray when he broke to go 3-1 up in the first set but the inconsistency which has plagued his recent game was highlighted in the next game when he blew a 40-0 advantage to be broken straight back.
Then a series of uncharacteristic forehand errors presented Fish with another break for a 5-4 lead in the first set and the American claimed his advantage when Murray flopped a backhand into the net.
Things did not improve for Murray at the start of the second set, when he was immediately broken again by a huge backhand return from Fish, who claimed his fourth game in a row.
Fish wriggled out of two break points against his serve in the eighth game to maintain his advantage and although Murray served out himself it still gave Fish the chance to serve for the match.
With the home crowd roaring him on, Fish saved a break point before taking advantage of his second match point opportunity, flashing a cross-court volley to draw the curtain on a distinctly unimpressive Murray display.