New Delhi, Jan. 23 -- Novak Djokovic dropped a service game for the first time in this Australian Open and then didn't lose another point against Francesco Maestrelli, advancing to the third round with a 6-3, 6-2, 6-2 win.

It was Djokovic's 399th win in a Grand Slam singles match, leaving the 24-time major just one more to be the first player ever to reach 400.

The break of serve, in the sixth game of the third set Thursday, was almost like Djokovic was doing a rehearsal for later matches. He followed a second serve to the net but then missed the volley to give it up.

It stung the 38-year-old Djokovic, a noted perfectionist. He broke Maestrelli at love in the next game to take a 5-2 lead, smacking the last ball into the net after the I...