RBC Canadian Open: Shane Lowry a shot off lead in Toronto after opening round as Brooks Koepka fires eight birdies

At the opening round of the RBC Canadian Open in Toronto, six players share the lead at six under par, including Brooks Koepka who carded eight birdies and two bogeys for a 64. Ireland's Shane Lowry sits one shot off the lead at five under, still seeking his first PGA Tour win of the season. England's David Skinns is also one shot back, with the second round scheduled to be broadcast live on Sky Sports Golf on Friday.