 Complete the following phrase:  In May 2013, Robertson made the second official maximum break of his career in the Wuxi Classic qualifiers against Mohamed Khairy. In the main stage of the tournament, he defeated John Higgins 107 in the final to secure his eighth ranking event title. He came from 25 down against Higgins to lead 85 before withstanding a fightback to complete the victory and ensure his second consecutive ranking event win in China. In his home tournament, the Australian Goldfields Open, he made it past the second round for the first time in the three stagings of the event, before continuing his run by beating Joe Perry 52 in the quarter-finals and Mark Selby 63 in the semis.ref name201314ref He would have become the first man since Ronnie OSullivan in 2003 to win back to back ranking events in the same season, but he lost 69 to Hong Kongs Marco Fu in the final. On 8 December 2013, Robertson defeated Mark Selby 107 in the final of the 