LONDON, July 7 : Novak Djokovic reached an eighth straight Wimbledon semi-final after grinding down Canadian Felix Auger-Aliassime 7-6(10) 3-6 6-3 6-7(4) 7-6(10-4) in an epic battle on Tuesday to set up a blockbuster showdown with reigning champion Jannik Sinner.Djokovic, the seventh seed, chuckled after several missed chances in a long opening-set tiebreak, and had the last laugh when Auger-Aliassime blasted a volley long to surrender a set that he should have comfortably won.A double fault from Djokovic gifted Auger-Aliassime a break to go up 5-3 in the next set and the Canadian held his nerve and serve in the next game to draw level in the contest, before the Centre Court roof was closed at around 7.40 p.m. local time.The move prompted complaints from Djokovic, but he composed himself a