Tottenham Hotspur is to take court action over the decision to hand the Olympic Stadium to West Ham after the 2012 Games, the BBC has said.
West Ham was chosen as the preferred bidder by the Olympic Park Legacy Company (OPLC), ahead of its Premier League rivals.
The club’s decision to seek a judicial review coincides with the completion of construction on the stadium.
An OPLC spokesman said: “We can confirm that a letter before action in relation to potential judicial review proceedings has been issued.
“The Olympic Park Legacy Company ran a very rigorous and transparent process in its selection of the recommended preferred bidder.
“We have been supported by independent experts in their field in terms of legal, financial, commercial and technical advice.
“We have been consistent, fair, objective and entirely equal in our dealings with the bidders from start to finish.
“We are confident that if these judicial review proceedings are pursued, our approach will be entirely vindicated by the courts.”