Four is proving a winning number for Lance Franklin, as Sydney continued their dominance of the harbour city AFL derby with a 25-point win over GWS Giants.

The Giants slashed a 31-point last quarter deficit to 12, but the Swans steadied to record a 14.9 (93) to 10.8 (68) victory at the SCG on Saturday move to a 3-0 record and top spot.

Franklin kicked four goals for the third straight round and tallied 18 disposals and six marks in a busy display.

Franklin’s fourth major and Kurt Tippett’s second finally quelled the Giants resistance.

It took almost 18 minutes for the first goal to come, with long distance set shots to Tom Mitchell and Franklin providing the only majors of a tight first quarter.

Sydney finished with a 67-47 advantage in inside 50s, but didn’t capitalise early on.

The Giants, who are now 1-2, kicked three successive goals from 15 metres or less to take the lead briefly in the second quarter.

Sydney led by six at halftime and 14 at the final change and looked to be home after Franklin booted a massive set shot from over 55 metres.

Dynamic midfielder Luke Parker won the Brett Kirk Medal for best on ground after notching 30 possessions, seven marks, six tackles and a goal in a typical all-action performance.

Midfielders Dylan Shiel and Lachie Whitfield each tallied 28 touches for GWS.