qualifier David Gilbert 13–9 to set up a quarter-final clash with Ronnie O'Sullivan. Robertson was 5–3 ahead after the first session, but his opponent produced a match defining run of six frames in a row and went on to win 13–10. Robertson finished the season ranked world number seven. 2012–13 season Robertson once again began the season poorly as he lost in the first round of the Wuxi Classic, and the second round of both the Australian Goldfields Open and the Shanghai Masters. He returned to form at the minor-ranking Gdynia Open in Poland by defeating Jamie Burnett 4–3 in the final. At the inaugural International Championship in Chengdu, China, Robertson saw off Ryan Day, Matthew Stevens, Lü Haotian, and Shaun Murphy in the semi-finals by the scoreline of 9–5, to reach the final. There he led Judd Trump 8–6, but lost four consecutive frames to suffer an 8–10 defeat. He enjoyed a comfortable passage into the quarter-finals of the UK Championship with 6–1 and 6–2 wins over Tom Ford and Barry Hawkins respectively, to face Mark Selby. Robertson squandered a 4–0 lead to lose 4–6 in a match that finished after midnight. Robertson started 2013 by attempting to defend his Masters title. He produced a comeback in the first round against Ding Junhui by taking the final three frames in a 6–5 triumph, shouting "You beauty!" when he potted the clinching red. Another deciding frame followed in the next round against Mark Allen, with Robertson making a 105 break in it to progress to the semi-finals, where he had a more comfortable 6–2 win against Shaun Murphy. Robertson won three frames from 3–8 down to Mark Selby in the final, before Selby held off the fightback by taking the two frames he required to win 10–6. Robertson was beaten in the semi-finals of both the German Masters (2–6 to Ali Carter) and the World Open (5–6 to Matthew Stevens). Robertson's Gdynia Open victory earlier in the season helped him finish fifth on the PTC Order of Merit to qualify for the Finals. Wins over Jamie Burnett, Barry Hawkins, Xiao Guodong and Tom Ford saw him reach the final. He faced Ding Junhui, and from 3–0 ahead went on to lose 3–4, meaning that Robertson, after having won his first six, had now lost his last three ranking finals, along with a fourth major final at the Masters. Robertson returned