The weather was the key player again on day two of the US PGA Championship as fog disrupted the start of play for the second day running. A handful of players were still to finish their first rounds late last night, leading to a huge congestion headache for organisers at Whistling Straits in Wisconsin. Some players seemed to take the chaos in their stride, though, as Matt Kuchar - beginning his second round barely an hour after completing his first at the top of the leaderboard - birdied the second to open up a two-stroke lead.
Ernie Els , twice US Open champion, cut the American's lead to one shortly afterwards by birdieing the 11th, his second of the round. It was not such good news for Northern Irishman Darren Clarke, starting the day at three under, who dropped five shots in four holes, and is in danger of missing the cut, projected at two over. World No 1 Tiger Woods began his second round on one under. * Compiled by Matt Smith