Tennis legend Andre Agassi believes that Novak Djokovic is capable of winning all four Grand Slam tournaments this year.
Agassi, who won eight Grand Slams during his career, says that the current world number one has the ability to go on and dominate 2015.
"I don't want to put pressure on him, but after watching Novak competing in Melbourne, I think there is a chance we might see a player winning all four Grand Slam tournaments in the same year," Agassi said on Tennis World.
"I believe Novak is playing above all others right now and he also has room for further improvements. If Rafael Nadal will not confirm his win at the French Open, I think we are going to see a domination this year from the Serb."