( CNN ) -- If Matt Kuchar is feeling any ill effects of his Masters mishap it did n't show in the opening round of the RBC Heritage in South Carolina on Thursday . The world No . 6 , who tied for fifth following a disappointing two-over par final round of 74 at Augusta National last Sunday , bounced back at the Harbour Town Golf Links firing a flawless five-under par round of 66 . Starting at the 10th , Kuchar fired two birdies on his opening nine before claiming three more coming home to leave the 35-year-old tied for the lead with Scott Langley and William McGirt . Harris English is fourth on three under after opening with a round of 68 . Newly-crowned Masters champion Bubba Watson is sitting out this tournament but his closest rival for the Green Jacket and final round playing partner , Jordan Spieth was back out on course Thursday . The 20-year-old started in assured fashion posting a 69 after being paired with another Watson -- U.S. Ryder Cup captain Tom . The veteran shot a four-over 75 while casting an eye prospective team members for this September 's match at Gleneagles , Scotland . Spieth 's two-under par total leaves him in a 15-way tie for fifth which includes compatriot Bo Van Pelt and Australia 's Robert Allenby . Luke Donald is one of 16 players tied at one-under par with defending champion Graeme McDowell a shot further back after an even-par round of 71 . Westwood heads multi-cultural Malaysia leaderboard . Lee Westwood put another major disappointment behind him posting an opening round 65 at the Malaysian Open on Thursday . The Englishman , who finished seventh at Augusta last weekend , fired a seven-under par round to finish top after day one at the Kuala Lumpur Golf and Country Club . Westwood heads a truly international leaderboard with Belgium 's Nicolas Colsaerts his closest chaser currently on six under . Immediately below him are Northern Ireland 's Michael Hoey and Ricardo Santos from Portugal who both shot five-under rounds of 67 on Thursday . Four players -- Jbe Kruger from South Africa , France 's Julien Quesne , Masahiro Kawamura from Japan and Scot Scott Jamieson -- are tied for fifth on four under with a further nine players sitting at three-under par . Read more : How many more majors can Bubba win ?
Matt Kuchar joint leader after opening round of RBC Heritage . Hide Caption 1 of 18 Photos:Photos: Rory McIlroy through the years Rory McIlroy through the years – The Northern Irishman celebrates with his caddie at Lee Westwood leads Malaysian Open by one stroke after day one in Kuala Lumpur .