Anthony Joshua says he will “walk through” fellow British world heavyweight champion Tyson Fury on his way to unifying the division.
The 26-year-old became IBF heavyweight champion with a stunning second-round stoppage of American Charles Martin.
Fury will defend his three versions of the world title against Wladimir Klitschko in Manchester on 9 July.
“I’m going to walk through Fury when he’s ready,” said Joshua. “I mean business and I’m here to stay.”
Immediately after the fight, Fury, who says he bet £1,000 on Joshua losing against Martin, tweeted: “So AJ gets a belt, but he looked slow and ponderous, and still looked like a bodybuilder. Let me slay the lamb.”
Joshua and Fury, 27, had been trading insults on social media in the build-up to the former’s fight against the previously unbeaten Martin.
It was hardly a contest at The O2 Arena on Saturday as the Olympic champion, in only his 16th professional fight, knocked down his opponent twice in the second round with two devastating right hands.
“I’m only quarter of the way there,” Joshua told Sky Sports Box Office, referring to his plan to unify the division.
“There’s still a lot of work to be done. I’ve done two rounds, so I’ll go to the changing rooms and work on the pads.
“I’ve got people like David Haye and Tyson Fury calling me out so I need to keep improving. Every fight gets better and better. I want to give value for money and I appreciate the ongoing support of the fans.”
Martin, 29, admitted he could not deal with Joshua’s power and said he lost his title, which he only won in January, to the “better man”.
“I got hit by a right hand I didn’t see and that cost me the fight,” said Martin. “I was OK but the referee came over at six, I got to the knee at seven, took a breath and when I stood up he was at 10.
“He’s not difficult to fight. He’s a great fighter, I want to say that, it was just that his right hand was fast, I didn’t see the right. He’s got good speed.”
You can hear a repeat of Joshua’s fight on BBC Radio 5 live sports extra every 30 minutes between 0600 and 1100 BST on Sunday, 10 April.