 Complete the following phrase:  OSullivan began the 200809 season by winning the Northern Ireland Trophy, defeating Dave Harold 93 in the final. OSullivan is the only player to win back-to-back ranking events in the last four years. He then reached the final of the Shanghai Masters, having defeated Stephen Maguire in the semifinals with two of the top breaks of 141 and 145. However, in the final, he was defeated 810 by qualifier Ricky Walden. In the Premier League, he secured a 72 win over Mark Selby, which meant that he had won the event eight times in total, and five times consecutively. However, OSullivan failed to defend his 