Lee Westwood won the Ballantine’s Championship yesterday with a flawless final round of golf to retain his position as world number one. The Englishman proved his class at the Blackstone Golf Club near Seoul, carding five birdies on his way to a superb last round 67 and 12 under par for the tournament, a shot clear of Spain’s Miguel Angel Jimenez. Westwood needed a top-five finish at the Ballantine’s to stop Germany’s Martin Kaymer overtaking him as number one after just a week on top. He has now recorded back-to-back tournament victories following his triumph at the Indonesian Masters the previous week.