Leading first-round scores on Thursday in the US PGA Tour RBC Heritage at Harbour Town Golf Links in Hilton Head Island, South Carolina (USA unless noted, par-71): 64 - Ian Poulter (ENG), Mark Hubbard 65 - Sebastian Munoz (COL), Viktor Hovland (NOR), Michael Thompson, Webb Simpson, Dylan Frittelli (RSA), Brice Garnett, Ryan Palmer 66 - Matthew NeSmith, Jordan Spieth, Tony Finau, Matthew Fitzpatrick (ENG), Erik van Rooyen (RSA), Mackenzie Hughes (CAN) 67 - Harris English, Patrick Rodgers, Vaughn Taylor, Daniel Berger, Brooks Koepka, Rickie Fowler, Ernie Els (RSA), J.T. Poston, Sepp Straka (AUT), Christiaan Bezuidenhout (RSA), Bryson DeChambeau, Max Homa afp