Novak Djokovic overcame Martin Klizan in a three-setter to reach the Miami Open third round, while Jo-Wilfried Tsonga opened his 2015 with a win.

Djokovic, the Serbian world number one and defending champion, beat Klizan 6-0 5-7 6-1 in a rollercoaster clash at the ATP 1000 event played on hard courts.

A four-time winner of the event, Djokovic lost just 11 points in a dominant third set – setting up a meeting with Steve Darcis.

Belgian qualifier Darcis edged left-hander Gilles Muller 6-4 6-7 (2-7) 6-3.

In his first match of 2015, Tsonga was too good for American Tim Smyczek 6-4 3-6 6-3.

The French 11th seed had battled an arm injury but returned on Saturday, sending down 11 aces in his win.

Tsonga will meet countryman Gael Monfils, who beat Filip Krajinovic 3-6 6-2 7-6 (7-4).

Another Frenchman, Gilles Simon, proved too good for Kazakh Mikhail Kukushkin in a 6-3 6-7 (5-7) 6-0 victory.

Big-serving Croatian Ivo Karlovic suffered a surprise loss, going down to Colombian qualifier Alejandro Falla 6-4 6-2.

Spanish sixth seed David Ferrer was untroubled, thrashing Federico Delbonis 6-1 6-1 in just 58 minutes, while Kei Nishikori also cruised as he beat Mikhail Youzhny 6-2 6-1.

Grigor Dimitrov also had a straight-sets win, brushing past Vasek Pospisil 6-2 6-2, while John Isner lost just six return points in his 6-3 6-4 victory over teenager Andrey Rublev.

Milos Raonic sent down 11 aces in a 6-1 6-4 win over Teymuraz Gabashvili.

In other matches, Thomaz Bellucci overcame Uruguayan Pablo Cuevas 2-6 6-2 7-5, while Alexandr Dolgopolov edged Tommy Robredo 6-7 (1-7) 6-3 7-5.

Spanish 13th seed Roberto Bautista Agut was sent packing, beaten by Jerzy Janowicz 6-4 1-6 6-4.

Lukas Rosol beat Alexander Zverev 7-6 (7-0) 6-3 and Viktor Troicki overcame Simone Bolelli 7-5 3-6 6-4.

David Goffin was a 6-0 6-4 victor against Croatian teenager Borna Coric, Jeremy Chardy beat Jurgen Melzer 6-4 6-1 and Adrian Mannarino overcame Albert Ramos 6-4 3-6 6-2.

Jack Sock defeated Fabio Fognini 7-6 (7-4) 6-1, Ernests Gulbis went down to Juan Monaco 6-2 6-4 and Fernando Verdasco beat James Duckworth 4-6 6-2 6-1.