Kevin Na leads England's Ian Poulter by two shots after the second round of the Crowne Plaza Invitational in Texas.
Some players complained about the quality of the Wentworth greens after the second round of the BMW PGA Championship.
Rory McIlroy missed the cut at the BMW PGA Championship on Friday after shooting a disastrous six-over-par 78.
Francesco Molinari recovered from a poor start to hold on to a one-shot lead in the BMW PGA Championship at Wentworth.
Luke Donald's plummet down the world rankings has resulted in his swing undergoing a massive overhaul.
Jordan Spieth and three others are tied at the top of the leaderboard after round one of the Crowne Plaza Invitational.
Francesco Molinari earned a two-stroke lead after the opening round of the BMW PGA Championship at Wentworth.
Rory McIlroy only managed to muster a one-under 71 in the first round of the BMW PGA Championship on Thursday.
Justin Rose is eager to impress at this weekend's BMW PGA Championship, an event which is close to his heart.
Padraig Harrington is a doubtful starter for the BMW PGA Championships at Wentworth this weekend due to an injury.