Pattaya, Thailand; May 6: Thai teen sensation Atiwit Janewattananond jumped to the top of the leaderboard at the Singha Pattaya Open with a closing birdie on Friday morning. Fifteen-year-old Atiwit carded a six-under-par 66 for a one stroke lead over countrymen Kwanchai Tannin and Thammanoon Sriroj in the season-opening event on the ASEAN PGA Tour…