World number one Djokovic, chasing a sixth Wimbledon and record-equalling 20th Grand Slam title, won 6-3, 6-3, 6-3 over the 102nd-ranked South African. London: Andy Murray rolled back the years to stage a thrilling Wimbledon fightback on Wednesday as defending champion Novak Djokovic played almost flawless tennis to reach the third round for the 15th time. World number one Djokovic, …