At the Masters, O'Sullivan defeated Robert Milkins 6–1 in the first round, before he whitewashed Ricky Walden 6–0 in the quarter-finals, a match that lasted just 57 minutes and 48 seconds. During the match he scored 556 points without reply, a new record in a professional event, beating the previous record of 495 points set by Ding Junhui at the 2007 Premier League Snooker. He defeated Stephen Maguire 6–2 in the semi-finals to reach a record tenth Masters final, surpassing the nine appearances by Stephen Hendry. Facing defending champion Mark Selby in the final, he took a 7–1 lead in the first session, before going on to a 10–4 victory for his fifth Masters title. On 22 January 2014, the Disciplinary Committee of the WPBSA issued a statement that O'Sullivan had been found in breach of the association's Members Rules. It fined him £6,000 and ordered him to pay £1,000 in costs over three posts on his personal Twitter account, made in September and October 2013, that it deemed damaging to the image of the sport. The first post related to match-fixing allegations, the second to a suggestion that he had used performance-enhancing drugs, and the third to a tweet that was described as "offensive". The committee fined him an additional £1,000 for making "abusive, insulting and disrespectful" comments to referee Jan Verhaas during the December 2013 qualifying round for the German Masters. The incident arose after Verhaas asked O'Sullivan to tuck his shirt in during the match. O'Sullivan apologised for his conduct with the referee, stating that he felt unwell on the day and that the venue was overly warm.