Leyton Orient chairman Barry Hearn claims his side could be ruined by West Ham’s potential move to the Olympic Stadium.
The Hammers have made an official bid to take over the 80,000-seat facility following the 2012 Games, with Spurs also lodging an interest.
And Hearn, who took control of Orient in 1995, is worried the Hammers could put the League One club out of business if they become neighbours in two years’ time.
He told the Alan Brazil Sports Breakfast on talkSPORT: “I am concerned, particularly with the size West Ham are.
“I’m concerned with what marketing initiatives they are going to do because if you’ve got a spare 50,000 seats, presumably you’re going to go out and (offer) kids (entry) for a point and try and fill the place up. That will destroy my football club.
“I’ve been chairman for 15 years, I’m trying to run a proper business. It’s hard already – that makes it impossible.
He continued: “It’s a little bit like Tesco’s moving next door to the little shop on the corner. Everyone forgets the little shop on the corner and they forget what it adds to the community and how long it’s been there.
“And the implications of a massive club like West Ham or Tottenham moving there in a stadium which has got more than double the capacity they’re used to, and the fact that we are in their shadows, it’s potentially really bad news for Orient.
“But, as you’d expect, we’re not going to just lay down and take it so we’re going to cause problems.”