LONDON—A business-like Novak Djokovic threatened to short-change over 14,000 fans who had forked out 170 pounds ($234) for Wednesday’s Centre Court tickets when, after only 19 minutes of action, he stood on the cusp of bagging the first set 6–0. Trailing 0–5 and 15–40 on serve, it seemed like Marton Fucsovics’s first foray into a Grand Slam quarterfinal would be short and not very sweet. But somehow the 29-year-old avoided disappearing into a Wimbledon sinkhole for two hours and 17 minutes before Djokovic pushed him over the edge for a 6–3 6–4 6–4 win that secured him a place in the All England Club semifinals for a 10th time. Playing in his 50th Grand Slam quarterfinal, Djokovic recorded a century of tour-level wins on grass and his 315th victory at a major. While such numbers might sound impressive, for Djokovic the only statistic that really matters is that his dream …