England&aposs Brian Davis produced his best round of the season to take a one-shot lead after the opening round of the RBC Heritage. The 38-year-old, who lost a playoff to Jim Furyk in 2010 after calling a penalty on himself, carded a six-under 65 on Thursday to top the leaderboard in South Carolina. Davis set up his round with three consecutive birdies from the 5th hole and claimed the overall lead with another birdie on the 17th to sit a shot ahead of American pair Kevin Streelman and Charley Hoffman. Australia&aposs Marc Leishman and Jason Day continued their strong form from the Masters last week to land in a tie for fourth on four under alongside Johnson Wagner of the USA. Davis had an early setback in the first round of the PGA Tour event at Harbour Town Golf Links on Hilton Head Island, bogeying the fourth hole. But successive birdies on the 5th, 6th and 7th holes took him to two under before another birdie on the 9th completed a strong front nine. Three more birdies followed, plus a bogey on the 12th hole, as Davis took the overall lead. Hoffman would have joined Davis in the lead but for a bogey on the 17th, which saw him drop to five under alongside Streelman. Leishman and Day – who were both in contention late in their final rounds at Augusta before compatriot Adam Scott beat Argentine Angel Cabrera in a playoff – produced bogey-free rounds on the narrow fairways and tiny greens of Harbour Town to sit in a strong position heading into Friday&aposs second round. A group of 17 players, including Webb Simpson, reigning champion Carl Pettersson of Sweden and Hunter Mahan, sit a stroke behind Leishman and Day on three-under.