- Robert Rock leads thunderstorm-hit Joburg Open after second day
- Englishman is 11-under-par after second round four-under 67
- Two-time defending champion Charl Schwartzel trails by eight shots
- Graham DeLaet of Canada leads Sony Open in Hawaii after first round
England's Robert Rock led the Joburg Open when thunderstorms brought play to an early end Friday while two-time defending champion Charl Schwartzel faced an anxious wait to see if he will make the halfway cut.
Rock carded a four-under-par 67 on Royal Johannesburg and Kensington's West Course to add to his opening 65 over the East layout for an 11-under-par 132 halfway total.
Reigning U.S. Masters champion Schwartzel improved on his first day level-par 72 to shoot a three-under 68 on the East, but is right on the projected cut-line with half the field still to complete their second rounds.
The World No.9 admitted he had been below his best, particularly on the greens.
"It's pretty easy when things are going your way, but on days like this it becomes a mental battle," he told gathered reporters after his round.
"I felt I hung in well, I didn't get down on myself. It would have been easy to lose my temper, but so early in the year, there's no point. The only way through it is to play, and hopefully I can get into the weekend," he added.
Rock has a one-shot lead over South Africans Jbe Kruger and Branden Grace after both carded second rounds of 66 on the West Course.
Another South African, Michiel Bothma, is in the clubhouse on nine-under, but his compatriot George Coetzee will threaten Rock's lead when he resumes on the East course Saturday morning on the same mark with 12 holes to play.
First round leader Jamie Elson of England, who carded an eight-under 63 on the East Course, did not get the chance to start his second round before the storms came in.
Two-time U.S. Open champion Retief Goosen is also well-placed on seven-under having completed just six holes of his second round.
Meanwhile on the PGA Tour, Canada's Graham DeLaet took the first-round lead in the $5.5 million Sony Open in Hawaii.
DeLaet carded an eagle-birdie-birdie finish for a seven-under 63 at the the Waialae Country Club.
He had a two-stroke lead over South Korean K.J. Choi, Sweden's Carl Pettersson and Kyle Reifers, who shot 65s.
"I'm just so excited to be back out," DeLaet, who is returning after being sidelined for nearly a year with back surgery, told AFP.
Steve Stricker, winner of the season-opening Tournament of Champions, shot a 66 to share fifth place.
The American is trying to become the first player since South African Ernie Els in 2003 to win the Tournament of Champions and Sony Open.