O's manager Slade praises never-say-die attitude of club
A last-minute equaliser from Jonathan Tehoue ensured that the home side will travel to the Emirates for a fifth round replay for the right to face Manchester United at Old Trafford in the quarter-finals.
Hearn praised his side and manager Slade following the last-gasp equaliser and claimed that Arsene Wenger was too concerned in regards to resting his side.
He told ESPN: "What Russell Slade and the team have done, they don't know how to give up. We didn't play the best football we've played all season by a long, long way but they're not bad this Arsenal are they?
"Arsene was trying to nick it and get away with giving his bloke's a little rest. If we equalise in the 70th minute, the floodgates are open, on comes [Cesc] Fabregas and we're all in desperate trouble but he's got a little bit complacent and the other Frenchman put the boot in.
"We've left it until the last minute and once again Arsene has been out-thought by a better brain."
Hearn had stated prior to the game that he will pay for the player's to go to Las Vegas if they were to get a draw against their illustrious Premier League opponents.
He added: "We went to Las Vegas when we got promoted and every year I say play-offs, now I suppose it will have to be Las Vegas plus something if we make the play-offs, so there's plenty to go for. I'm up for going tonight."
Hearn also spoke out in regards to the battle for the Olympic Stadium after the 2012 games, which he feels is set to damage the club's support after West Ham United's victory.
He said: "It's about giving a platform to Leyton Orient and it's the small blokes getting bullied by the big blokes. The FA Cup is an example to football about what's good about football. We don't change anything when the little guy gets a chance.
"Our scrap on the Olympic stadium is going to go on and on and we're looking for support from the government and now this is going to help us. If they want to see little community clubs like Orient, there are 72 of them up and down the country, I would say look out because not only have we got a good case to put but we've now got a load of money."
Orient manager Russell Slade also praised his side's spirit, though did admit that they didn't play their best football.
He said: "The chairman's right, I don't think we played our best football and I was a bit disappointed to be honest because we kept turning the ball over but there is a great spirit and a great attitude and we kept plugging away.
"I thought it was going to go past us and we were going to lose with dignity but to get the goal was fantastic really and reward not only for today's performance but that's the seventh game in the FA Cup. We nearly went out at the first hurdle and to stay in there, it's the same in the league. That's one defeat in 21 and you've got to be happy with that.
"We're now in a position where we have four, five or six players on the bench that can come on and make a difference. Tehoue's never scored before the 85th minute but he's got eight or nine goals. It's incredible really."
Slade also spoke of the difference he has seen at the club since he arrived last season.
He said: "Everyone was half empty when I arrived and you have a responsibility as a manager to try and build a football club if you can and now everybody's behind the team, the chairman's got his enthusiasm back and everybody's pulling together. The team never say die and I think the fan's appreciate that."