iAfrica Oosthuizen Keeps His Cool To Retain Open Lead Golf - The 149th Open Championship - Royal St George's, Sandwich, Britain - July 17, 2021 South Africa's Louis Oosthuizen in action during the third round REUTERS/Paul Childs 5 hours ago 3 min read Share with your network! South African Louis Oosthuizen held his nerve to lead the British Open by one shot after a gripping third round played out in bright sunshine at Royal St George’s on Saturday. Oosthuizen, the 2010 Open champion, had moved serenely to 13 under par with a birdie at the ninth hole before two bogeys, his second and third of the tournament, halted his progress.