Novak Djokovic
Novak Djokovic said he will try to win all the Grand Slam events this year. Reuters/Naseem Zeitoon

Novak Djokovic believes there is no guarantee on what will happen of his tennis career this year, but the Serb admitted he plans to win every tournament and Grand Slam event he will join in the 2016 season.

“I can’t really predict what’s going to happen or guarantee if I am going to win any of the Grand Slams or all four,” Djokovic said, reports Tennis World USA. "Obviously I am going to try to win every tournament and every Grand Slam that I play on. That’s the kind of mindset that I have."

Djokovic won three Grand Slams last year, conquering the Australian Open, Wimbledon, and the US Open. His lone Grand Slam loss came at the hands of world No. 4 Stan Wawrinka in the final round of the French Open.

Djokovic, who was eliminated in the quarterfinal round of the Qatar Open last year by Ivo Karlovic, has started his season in Doha for the second time in a row. The world No. 1 defeated Jamaican-American Dustin Brown 6-2 6-2 and now awaits the winner in the match between Spain’s Fernando Verdasco and Tunisia's Malek Jaziri.

"It's been six weeks since I played the last match, so I was very excited to go back to the court and compete and see how I go," Djokovic said, reports the ATP’s official website. "You can do your best to prepare yourself well, which I did. I think I used the off season very well to train to get my body in the right shape, and I think it was a very good start."

Meanwhile, second seed Rafael Nadal will square it out with fellow Spaniard Pablo Carreno Busta in the first round. Defending champion David Ferrer will face Illya Marchenko of Ukraine in the first round today, while third seed Tomas Berdych looks to get past Ukrainian Sergiy Stakhovsky.