AFL leaders Port Adelaide have thumped St Kilda by 70 points at Adelaide Oval on Saturday.

The menacing Robbie Gray, who kicked four goals and Chad Wingard, who took a memorable mark of the year contender and bagged three majors, were the stars of the evening for the Power as they trounced the Saints 19.15 (129) to 9.5 (59).

Port’s midfield brigade of Hamish Hartlett (36 disposals), Ollie Wines (26) and stand-in captain Brad Ebert (22, nine tackles) stood up to great effect in the absence of skipper Travis Boak.

The Saints, led by captain Nick Riewoldt’s four-goal haul, also had solid contributions from veteran Lenny Hayes (26, seven tackles) and midfield duo Jack Steven (29) and Luke Dunstan (24).

The Power raced out to an early lead in the opening term, piling on four goals without reply.

The visitors finally hit the scoreboard with a goal when Riewoldt capitalised on a 50-metre penalty, before the Saints skipper threaded through another after the siren to reduce the margin to 13 points.

The second stanza was a tight affair with the first major for either side finally coming after 17 minutes when Saints midfielder Josh Saunders goaled.

St Kilda then stunned the home faithful of 42,374 when Terry Milera tied up the match at 29 apiece after a clever finish.

Port hit back instantly when Hartlett unleashed a booming goal from outside 50 that was the catalyst for a customary Power surge as the hosts piled on three goals in a frenetic three minutes to extend their lead to 19 points at the main break.

Port hit full throttle following halftime, thumping through six unanswered goals before the Saints could add to their total to race out to a 53-point lead at three-quarter time.

Wingard’s second major was the pick of the bunch in the third term after the forward maestro took a spectacular high-rise grab before cheekily snapping through to goal.

The Power registered six more majors in the last quarter, including two to Jay Schulz, to put the icing on a huge win.