Mark Selby demonstrated his battling abilities remain intact as he fought back to share the opening session of his World Championship second-round clash with Yan Bingtao. The defending champion has had a tough season, both on the table and off it, but he looks in no mood to surrender his crown as he did not allow Yan to get the upper hand. Ad/> It was a session that never really caught fire, with arguably the most excitement being when a pigeon dive bombed into the Crucibie, to the amusement of players and fans alike — and gave commentators the chance to dust off a series of terrible jokes.