Byeong Hun An shot a 5-under 67 Saturday to share the lead with Francesco Molinari after the third round of the BMW PGA Championship.
The South Korean trailed Molinari by a shot after the second round but made seven birdies, including two in the last two holes, to equal the Italian's overall score of 14-under 202 going into the final day.
Molinari, who has led from round one, shot a 68. Thongchai Jaidee of Thailand was two shots back in third after a 68.
Miguel Angel Jimenez hit a European Tour-record 10th hole-in-one when he converted his tee shot from 148 yards at the par-3 No. 2.
The 51-year-old Jimenez is four shots backs from the leaders going into the final day.
Top-ranked Rory McIlroy missed the cut after a 78 on Friday.