Jon Petrie injured his neck in the defeat to NSW Waratahs

"It was probably the most disappointing performance since I've been Scotland coach," said Williams.

"The players had no excuses. Four of the tries were from turnovers and breakaway tries.

"We felt that the Scotland team had more to give. We are very disappointed with that."

Williams added: "There certainly wasn't the urgency to the breakdown, we sent one runner out on his own without going with him time and time again and we missed a couple of first-up tackles.

"It's disappointing because we are looking for consistency of performances."

Scotland, who have already lost five players to injury on tour, suffered another scare with Jon Petrie taken to hospital for scans on his neck.

"Jon Petrie felt a crack in his neck and he is off to the Royal North Shore hospital," said Williams.

"He is walking and it is just a precaution but you don't muck around with neck injuries."

Although the Scotland camp were disappointed, centre Graeme Morrison produced another impressive display up against former Australia international Nathan Grey.

"Graeme Morrison was absolutely outstanding, the best player on the field," continued Williams.

"He made the gain line and broke it every single time."

Fly-half Gordon Ross was playing for a place in the Test side and Williams was encouraged by his display after a difficult start.

Ross, who is in competition with Dan Parks for a start in the first Test against Australia on Sunday, miscued his first three clearances and then failed to deal with a grubber kick through and his bungle led directly to the Waratah's first try.

"Gordon played quite well given there was not much momentum from the forwards," said Williams.

"He had a solid game. His first couple of kicks were wobbly but it (the selection of fly-half) is a nice problem to have."