article_snippet.sent: On the table the five-time world champion enjoyed a successful day, firing two rapid centuries in establishing a 12-4 lead, needing just one more in Monday's closing session to the match to reach the quarter-finals.
article_snippet.sent: second round match  at the Crucible Theatre .
article_snippet.sent: The warning from referee Olivier Marteel could be the end of Sunday's matter.
article_snippet.sent: Armed with a 5-3 lead from the opening session, Ronnie O'Sullivan took the opening two frames on Sunday to pull further in front.
article_snippet.sent: The next went against the 39-year-old, but breaks of 110 and 139 in consecutive frames suggested Ronnie O'Sullivan was in unstoppable form, as sweeping through the subsequent three testified.
article_snippet.sent: Ali Carter continued to struggle in Ali Carter match against Australia's Neil Robertson.
article_snippet.sent: The 35-year-old from Essex, who trailed 6-2 following Saturday's opening session, won the first frame of the day but lost the next five.
article_snippet.sent: A finish with a session to spare was possible when Australia's Neil Robertson led 11-3, but Ali Carter took the last two frames of the day to avoid that indignity and trail 11-5 overnight.
article_snippet.sent: Earlier, Shaun Murphy left Joe Perry with a mountain to climb as their second-round clash got under way, surging 7-1 in front, while Judd Trump built an early 5-3 lead over Marco Fu.
highlights_snippet.sent: Ronnie O'Sullivan is closing in on World Championship quarter-final spot .
  
highlights_snippet.sent: Five-time world champions needs one more frame to secure progression .