Joshua's pro debut to air on ESPN3

Fight fans in the United States will be able to watch a legal stream of the big fight card at the O2 Arena in London on Saturday.

The card, headlined by the professional debut of 2012 British Olympic super heavyweight gold medalist Anthony Joshua, will stream live beginning at 3:30 p.m. ET on ESPN3.com after a deal was finalized on Thursday.

The 23-year-old Joshua faces Emanuele Leo (8-0, 3 KOs) of Italy in the six-round main event.

The stream, which will use the Sky Sports call of the fight from the British broadcast, will also include several undercard bouts, including England's Scott Quigg (26-0-1, 19 KOs) against Miami-based Cuban Yoandris Salinas (20-0-1, 13 KOs) for a vacant junior featherweight title and lightweight contender Kevin Mitchell (34-2, 24 KOs) against Marco Lopez (23-2, 14 KOs).

Joshua is pumped up to get his pro career started after reaching the pinnacle as an amateur.

"I'm really proud to be making my debut on such a massive show -- this really is the big time now," Joshua said. "Leo has got in the ring eight times and won eight times so he knows what he is doing and he'll want to make that nine-for-nine. He'll be feeling the pressure of that record. It's a great feeling to be an undefeated fighter and he'll want to keep that going.

"I am very calm. Whoever is put in front of me I'm going to give it my best and I am sure he will. I've been like that since the amateur days, because I knew that with the limited experience I had, in order to get to the top of the amateur world I had to beat the best in the world. So even when I was a real novice I was fighting the No. 1 in the world when I was ranked No. 50 and I just thought, 'OK, let's get it on.'

"I've had a lot of time in the gym to work on a lot of things and I'm looking forward to putting it all on display. I'm in good condition. I think I've improved. I will be nice and relaxed, so I'm in a good place before Saturday."