Walden began using a new cue at the start of the 2013–14 season and lost in the first round of the opening two ranking events, but won the minor-ranking Bluebell Wood Open, defeating Marco Fu 4–3 in the final. In the UK Championship, Walden defeated Mark Williams 6–5 in the last 32, Ding Junhui 6–4 in the last 16, and Mark Allen 6–2 in the quarter-finals to reach his second UK semi-final in three years. Playing Mark Selby in the semi-final, he was on the receiving end of snooker's 100th professional maximum break in the seventh frame and went on to lose the match 9–5. Five days later, Walden witnessed another 147 against him, this time by Gary Wilson in qualifying for the German Masters, a match that Walden lost 5–3.