PONTE VEDRA BEACH, Florida (Reuters) - American Zach Johnson knows all about conquering the most challenging courses after winning the Masters in 2007 and he says there is a similar process in tackling this week's venue, the TPC Sawgrass. The 36-year-old matched the best score of the day with a six-under-par 66 to surge into a three-way tie for the second-round lead at the Players Championship on Friday while world number one Rory McIlroy headed home early after missing the cut. ... More...