(Reuters) - Former world number five Ian Poulter celebrated his return from a four-and-a-half month injury absence by vaulting into a share of the lead at the $1 million Macau Open on Thursday. The 40-year-old Englishman birdied all the par-five holes at Macau Golf and Country Club to join Spaniard Carlos Pigem on seven-under-par 64 at the Asian Tour event. Thailand's Chapchai Nirat was in third place on 65, one ahead of Australian Marcus Fraser and India's Anirban Lahiri. More...