Richmond's No.1 draft pick Sam Lalor has suffered a concussion and been forced off the field after a nasty collision in the dying stages of the pre-season hitout against West Coast.

Lalor appeared to hit his head when he was pushed into Eagles trialist Sandy Brock in a marking contest.

The 18-year-old was assessed by medical staff as he lay on the ground for about one minute before walking off the field.

It was later confirmed that he will enter the AFL's concussion protocols, meaning he will miss the club's AAMI Community Series game against Collingwood next Wednesday.

Richmond's season-opener is against Carlton on March 13.

"He's got a bit of a sore jaw at the moment, so he's currently in concussion (testing) protocols," Richmond head of development Sam Lonergan told reporters.

"We'll just wait and see what that looks like and then hopefully find out pretty quickly over the next 24 hours.

"He was great today. He played a little bit in the midfield and spent some time forward, which was fantastic, and contributed in both areas of the ground."

Earlier, Lalor kicked the Tigers' first goal with a set shot in an even opening period of three at Mineral Resources Park in Perth on Monday.

But it was all West Coast after that as Tyler Brockman booted three goals in a comfortable 10.2 (62) to 4.2 (26) victory for the home side.

Tyrell Dewar almost pulled in a spectacular mark on an opponent's shoulders and provided a highlight with a superb goal on the run from 50 metres.

Former Carlton forward Matt Owies kicked his first goal for West Coast, while former Tigers Jack Graham and Liam Baker also lined up in Eagles colours for the first time.

For the Tigers, Jacob Blight – a 23-year-old picked in last year's mid-season draft – showed promising signs behind the ball.

WEST COAST          1.0     7.2     10.2 (62) 
RICHMOND            1.1     1.1      4.2 (26) 

GOALS
West Coast: Brockman 3, Allen 2, Hewett, Long, Petruccelle, Dewar, Owies
Richmond: Lalor 2, Hayes-Brown, Mansell