WEST Coast has laid bare the huge task facing Melbourne coachPaul Roos with a 93-point demolition at the MCG on Sunday.

A knee injury to star defender Shannon Hurnwas the only lowlight for the Eagles in the 18.15 (123) to 4.6 (30) thrashing -their second straight win to start the year.

Luke Shuey and Nic Naitanui starred in themidfield and Josh Kennedy kicked four goals in his 100th game.

It was the biggest loss Roos has endured as asenior coach, beating the previous-worst margin of 73 when he was at the Swans.

By contrast, the Eagles were ruthless a weekafter crushing the Western Bulldogs by 65 points to open their season.

Hurn was subbed out in the second term aftersuffering the injury in the first few minutes of the match.

The Eagles took control from the start andkicked four goals in 13 minutes, putting the Demons out of the contest.

West Coast bullied Melbourne at theclearances, winning them 13-3 in the first quarter.

When the Eagles weren't surging forward,Melbourne was compounding its own misery by turning the ball over.

Five of the first eight West Coast goals weredirect results of the Demons coughing up possession.

Melbourne kicked one behind in the first termas West Coast took a 40-point lead into the first break.

The Demons did not kick their first goal untilseven minutes into the second term, through Shannon Byrnes.

He also kicked Melbourne's second goal at 23minutes into the third.

While it was a poor day for most Melbourneplayers, co-captain Nathan Jones again stood out with a gutsy performance inthe midfield.

Jones, who has won the last two clubbest-and-fairest awards, was relentless and finished with a game-high 34possessions.

Eagles coach Adam Simpson wasn't getting toocarried away with his side's unbeaten start to the season.

"We're happy. Don't get me wrong. We'repleased with the result and where we are. But it's a long year and we haven'treally been thrown in the deep end and tested yet," he said.

"I'm sure that's coming."

Roos, who has taken a patient approach duringhis brief time at Melbourne so far, was left frustrated after the defeat.

"Some of the stuff today … guys missingchest marks. I haven't seen that before, so it's an eye-opener for me. Some ofthe errors were just incredible," he said.

"If you get hold of the ball and youfumble it all the time, if you can't make tackles, they're the most basicthings in footy. Today we were just really poor at it."