 Complete the following phrase:  In his opening match, Walker defeated Ian Burns 52 to qualify for the 2013 Wuxi Classic in China. In Walkers first appearance in the main draw of a ranking event, he defeated Alex Davies 52 in the first round to progress to the last 32 stage, where he lost 52 against Ben Woollaston. Walker failed to qualify for the next four ranking tournaments, and lost in the last 128 match of the UK Championship.ref name201314ref He started 2014 by reaching the last 32 of the 