Novak Djokovic cruised past Lorenzo Musetti 6-2 6-2 to reach the quarter-finals of the Miami Open.

The match was delayed because of rain and world number five Djokovic, who has won six Miami titles, started slowly and was broken in the opening game as Italy's Musetti opened up a 2-0 lead.

But Serbian Djokovic, 37, completely dominated the match from that point.

The 24-time Grand Slam champion won nine consecutive games, closing out the first set 6-2 and moving 3-0 up in the second.

"It was tough, particularly in the first seven, eight games of the match," said fourth seed Djokovic.

World number 16 Musetti, 23, offered little resistance after winning those opening games as Djokovic cruised through to set up a tie with American Sebastian Korda.