Nick Kyrgios said he "just wanted to remind everyone" that he is "pretty good" after reaching the third round at Wimbledon with a dominant straight-set win over Filip Krajinovic.
The Australian, 27, admitted he spat in the direction of a "disrespectful" spectator at the end of an incident-filled five-set victory over Britain's Paul Jubb in the first-round.
He produced a clinical display on his return to action in a 6-2 6-3 6-1 win.
Kyrgios plays Stefanos Tsitsipas next.
Greek fourth seed Tsitsipas progressed with a 6-2 6-3 7-5 victory over Australian Jordan Thompson.
"I have been playing some really good tennis over the last month so I was really surprised with the way I played the other day. I wasn't great," Kyrgios said.
"There were a lot of positives. I didn't play anywhere near my best and I got through it. Today I was in my zone, great body language. I just played well.
"I just wanted to remind everyone that I'm pretty good."
Kyrgios could receive a fine following the spitting incident in his opener against Jubb, throughout which he was critical of the line judges and spectators - even asking the umpire to remove people from the crowd.
But the 2014 Wimbledon quarter-finalist produced a no-nonsense performance in his second match, winning 93% of points on his first serve and firing 24 aces on his way to a commanding victory.
Kyrgios and team-mate Thanasi Kokkinakis, the Australian Open men's doubles champions - dubbed the 'Special Ks' - have withdrawn from the doubles event to allow the world number number 40 to focus on his singles campaign.
On facing Tsitsipas next, he said: "I'm excited. We're two of the biggest stars in the sport. Hopefully if we both bring our best tennis, it's going to be amazing to watch."