The two-time Olympic and two-weight world champion took one round to figure out the Cuban before completely frustrating him and ending the fight on an injury.
Afterwards, Lomachenko spoke to ESPN and jokingly declared a name change moving forward.
“Maybe I’ll change my second name. Maybe now my name is ‘No-Mas-Chenko’,” he said to a huge wave of laughs from the Madison Square Garden crowd.
On his win over Rigondeaux, Lomachenko added: “He’s a good fighter, a top fighter. He’s a king but a king in his weight category. It’s not his size and not his weight so it’s not a big win for me because it’s another weight category.
“I need a rest maybe one month before I prepare for my next fight. But for my next fight I don’t know, maybe we ask my promoter Bob Arum.”
To boos from the crowd, Rigondeaux was then interviewed.
“I lost but it was because of my hand. I injured the top of it in the second round and could no longer continue.”
On Lomachenko, the veteran said: “He’s normal but he’s a very technical fighter, very quick and very explosive.
“I’ll come back and fight anybody because there are no excuses. It wasn’t about the weight, just the hand.
“I do give Lomachenko credit though, he is an incredible boxer,” added Rigondeaux.