Top-ranked Tiger Woods is looking forward to new rules adopted on Tuesday by the US PGA Tour that will limit grooves on irons starting next year, making it tougher to spin the golf ball.

US PGA Tour commissioner Tim Finchem decided to move forward with the change in time for a US Golf Association deadline after the nine-member US PGA Tour Policy Board chose not to make a ruling on a bid to delay the move until 2011.

"We do think there are some challenges here. We are comfortable that we can meet the challenges," Finchem said. "I concluded that delaying at this point in time probably was not in our best overall interests."