Chelsea and Tottenham Hotspur have been warned over their temporary plans to move to Wembley Stadium by the Premier League.
Both London clubs are working on redeveloping their stadiums, but Premier League chief executive Richard Scudamore has dismissed the idea of hosting their home games at the national stadium.
The Daily Mail quotes Scudamore as saying: "They know the rules and what we require. They have to provide a stadium. We can't have a fettered fixture list. Clubs have to be able to deliver 19 home games in the slots that are required.
"So if they share with a rugby league club, we can't be fettered as to when those clubs can play. It's up to them to work out with Wembley or where they want to play, can they deliver that level of commitment to us."
Scudamore also ruled out the possibility of splitting Spurs' home games between Wembley and Milton Keynes.