 Complete the following phrase:  At the 2015 World Championship, Jones took a 21 set advantage over Dean Winstanley but lost the final two sets by three legs to one in a 32 defeat. It was his third first round exit in a row at the event. Jones lost in the second round of the UK Open 52 to Joey ten Berge. Three last 16 exits were the furthest he progressed in any tournament in 2015. Jones qualified for the 