QUILLAN, France—Tadej Pogacar will head into the final week of the Tour de France with a commanding advantage to retain cycling’s elite title after he was unchallenged on the 14th stage won by Bauke Mollema on Saturday. Pogacar’s remaining rivals are all well behind in the standings—held off from attacking the defending champion during the hilly stage that sets up more serious tests in the Pyrenees. Pogacar’s UAE Team Emirates stayed comfortable at or near the front of the peloton through the 184-kilometer (114-mile) trek from Carcassonne to Quillan in southern France, content to let the breakaway group dispute the stage victory. The Slovenian holds a four-minute lead over Guillaume Martin. The French rider, who was in the breakaway group, moved from ninth overall to second. Rigoberto Uran, Jonas Vingegaard, and Richard Carapaz are all more than five minutes off Pogacar’s pace. Pogacar has kept the yellow jersey since he …