 Complete the following phrase:  After losing in the first round of the Australian Goldfields Open to Liang Wenbo, Stevens reached the quarter-finals of the Shanghai Masters by defeating Stephen Lee and Martin Gould. However, his run was ended by compatriot Mark Williams, who whitewashed him 05.ref name201112ref A last 16 exit in the 2011 UK Championship to Ding Junhui followed, before Stevens reached his second ranking event quarter-final of the season in the 