Jelle Klaasen was 3–1 down to Chisnall in the third round of the 2017 World Championship, before winning the next set and the first two legs of the sixth. Chisnall then took three legs in a row to win 4–2 and reach the quarter-finals of a PDC World Championship for the first time, where he faced reigning two-time champion Gary Anderson. Chisnall took the first two legs of the seventh set with the match at 3–3, but missed four darts to win it and Anderson would go on to triumph 5–3. Chisnall threw 21 180s, the joint highest ever in a PDC match and 33 were hit in total, one short of the record. Chisnall lost 6–3 in the final of the fifth Players Championship to Adrian Lewis.