Novak Djokovic set to dominate for years, says Andre Agassi
American legend says the Serb can lift his game above his rivals without even trying

American legend Andre Agassi said Novak Djokovic could be poised for a period of dominance in men's tennis after showing he can rise "a level above" his peers without even trying too hard.
Eight-time grand slam winner Agassi said barring mishap, the world number one looked set for a long stay at the top of the world rankings.
The 27-year-old Serb won seven titles this season, including Wimbledon, and finished with a flourish at the World Tour Finals in London.
I don't underestimate how much has to go right, but if everything goes right for everybody I've got to say he's the one I'll point to
"I have to [tip] Djokovic heading into the next year or two," Agassi said at the International Premier Tennis League in Singapore. "He seems like he just can hit cruise control and be a level above, and that's a huge luxury.
"He doesn't have to play lights-out to beat the top guys, he just has to play contained, which is a big statement to how well he's playing."
Djokovic had a winning record against all of his big four rivals - Roger Federer, Rafael Nadal and Andy Murray - in 2014 and he finished ranked top for the third time in four years.
With Federer now 33, Nadal returning from his latest lay-off and Murray struggling for form, the seven-time slam winner, who recently became a father, could now stay on top, Agassi said.