(Reuters) - Thailand's Thongchai Jaidee opened his British Open campaign with an even-par round of 71 and believes his putter must improve drastically if he is to climb up the leaderboard at Royal Troon. The 46-year-old, who became the oldest winner in European Tour's French Open this month, made two birdies on Wednesday, but a double bogey on the 15th hole left him with much ground to cover, as he trails leader Phil Mickelson by eight shots. The three-time Asian Tour Order of Merit winner said he needs to read the greens better to challenge the leaders.
