Novak Djokovic believes he still has plenty of room for improvement after brushing aside Andrea Seppi on Friday at the US Open.
The world number one faced a potential banana skin against Seppi, who beat Roger Federer in the third round of the Australian Open, but came through well to record a 6-3 7-5 7-5 victory at the Arthur Ashe Stadium.
It means Djokovic is still to drop a set at Flushing Meadows, while results also went his way on Friday as old foe Rafael Nadal was eliminated by Fabio Fognini.
The Serb will now face Roberto Bautista Agut in the fourth round and will be confident of progressing against the Spaniard who he has beaten in both of their previous meetings.
Although he was rarely troubled by Seppi, Djokovic admitted he was pleased to get through the clash and still feels he can improve over the next week in New York.
“I’m satisfied, but you can always do better,” Djokovic said. “We’re all perfectionists in a way. We see certain things we could have done better. But, again, a win is a win.
“I can’t underestimate the quality of my opponent today. He is 20, 25 in the world for a reason.
“He’s not afraid to go out in a big stadium and play his best against big players. He won against (Roger) Federer earlier this year in Australia. He’s a good player and it’s a good win.”
Djokovic is the comfortable 1.01 favourite to make it through to the fourth round with his opponent Bautista Agut the 13.00 outsider.