(Reuters) - Bernhard Langer survived a poor start and a strong challenge from Kenny Perry to stretch his lead to three shots after Saturday's third round of the Senior Players Championship in Pittsburgh, Pennsylvania. The 56-year-old German, seeking his third major title on the over-50s Champions Tour, recovered from two bogeys in the first five holes with a superb display of putting on the back nine to fire a four-under-par 66 at Fox Chapel Golf Club. American Perry, who won last year's Senior Players Championship by two shots at Fox Chapel, was alone in second at 12 under after carding a sizzling 65 that included an eagle at the par-five second and six birdies. Perry, who clinched his third consecutive major on the Champions Tour with victory at the Regions Tradition in May, had been one ahead with four holes to play but slipped back with a bogey at the 16th before the fast-finishing Langer took charge. More...