A spirited West Coast performance and an exciting display by rising star Harley Reid wasn't enough for the Eagles to overcome Sydney at Mt Barker on Saturday in Gather Round.

The Eagles produced a strong first-half challenge before the Swans pulled away for a 15.14 (104) to 11.12 (78) victory at Mount Barker on Saturday.

West Coast outscored an opponent in a quarter for the first time this season - kicking 5.6 to 3.2 in the second term - and held a narrow five-point lead at the main break.

But they were overrun in the second half as Sydney's class prevailed in front of 9225 fans.

No.1 draft pick Harley Reid was among West Coast's best and stood out with his strength and aggression around the contest.

He kicked his first AFL goal and finished with 18 disposals in another encouraging performance.

00:41

Harley strikes gold with first AFL goal

First-year Eagle Harley Reid puts through his first AFL major against the Swans

Eagles veteran Elliot Yeo (28 disposals, six clearances) and co-captain Liam Duggan (30 touches) battled hard while defender Jeremy McGovern fought on despite losing teeth in a collision with Braeden Campbell.

Duggan won the toss and chose to kick against a handy breeze that Sydney couldn't take full advantage of in the opening term.

The Swans had the first eight inside-50s but found themselves behind when Reid snapped truly and Cripps slotted a superb set shot from the boundary.

The Eagles' pressure was up throughout the first half and Reid's bullocking work was a highlight, as was Jack Petruccelle's huge mark on the back of teammate Maric.

Sydney added four goals to one with the breeze in the third quarter and a crucial 50m penalty against Reid - for encroaching in the protected area - allowed Hayward to give the Swans a 15-point buffer at the final change.

Local product Matt Roberts pounced to kick the opening goal of the last quarter and Sydney kept their opponents at arm's length from there.

06:20

Rd 4 highlights v Swans

The best moments from West Coast's Gather Round clash against Sydney from Mt Barker

Making matters worse for the Eagles, Luke Edwards was substituted out with a hamstring injury and Ryan Maric was taken to hospital with rib damage after he was cannoned into by teammate Jack Darling in a marking contest.

Isaac Heeney (26 disposals, seven clearances) and Errol Gulden (27, seven) stepped up at the right times for Sydney and kicked two goals each - a tally matched by Will Hayward, Joel Amartey and Logan McDonald.

James Rowbottom (19 disposals, six clearances) and Nick Blakey (25 touches) were also busy and Brodie Grundy was influential in the ruck as the Swans enjoyed a 44-32 advantage in clearances.

Grundy had a game-high eight of those himself along with 20 disposals and 31 hit-outs.

Heeney was awarded the HMAS Sydney II best afield trophy with the maximum nine votes from the three judges, ahead of Gulden (6), Yeo (2) and McGovern (1). 

WEST COAST    2.0     7.6     8.7        11.12 (78)
SYDNEY            3.5     6.7     10.10    15.14 (104)

GOALS
West Coast: Waterman 2, Cripps 2, Reid, Long, Hunt, Petruccelle, Maric, J.Williams, Kelly
Sydney: McDonald 2, Gulden 2, Hayward 2, Heeney 2, Amartey 2, Adams, Fox, Warner, McLean,  Roberts

BEST
West Coast: Yeo, McGovern, Reid, Duggan, Hough, Waterman
Sydney: Gulden, Heeney, Warner, Grundy, Rowbottom

INJURIES

West Coast: Luke Edwards (hamstring), Ryan Maric (ribs)
Sydney: Nil

SUBSTITUTES
West Coast: Loch Rawlinson (replaced Luke Edwards in the second quarter)
Sydney: Caleb Mitchell (replaced Taylor Adams in the fourth quarter)

Crowd: 9225 at Adelaide Hills