Ronnie O’Sullivan thumped the table in frustration as John Higgins reeled in the seven-time world snooker champion in an enthralling second session of their second round match at the Crucible on Sunday night. O’Sullivan twice led by five frames and looked set to cruise towards the quarter-finals at the expense of the out-of-sorts Scot, before Higgins drew on his decades of top-level experience to end the evening just two adrift at 9-7. A pivotal final frame of the session proved too much for O’Sullivan, who gave the cushion a painful rap with his knuckles after missing an early red, before Higgins edged over the line to finish much the happier of the two players. Ronnie O’Sullivan holds a 9-7 lead over John Higgins (Mike Egerton/PA) Higgins never got going in the early stages, but clawed out frame 14 despite fluffing an attempted escape from a snooker, and never looked back.…