‘I want to feel that pressure again’ insists Pierce O’Leary as he promises to be ‘at my best’ against Mark Chamberlain

PIERCE O’LEARY is ready to embrace the pressure — before letting all the air out of Mark Chamberlain. The duo clash at the 3Arena on March 14, with Big Bang — from Sheriff St — finally granted a Dublin homecoming. Portsmouth’s Chamberlain, 27, says that means all the focus will be on his rival and…