Tottenham have reportedly matched Chelsea's offer for Wembley Stadium.
Spurs are preparing to leave White Hart Lane for a brand new, £400m stadium close to their current home, with a planned move-in date of summer 2018 - but they need somewhere to play whilst that new stadium is being constructed.
Meanwhile, Chelsea are also planning to increase the capacity of Stamford Bridge to around 60,000 in a long-term £500m redevelopment, with both London clubs looking to grow and develop both on and off the field.
Both teams will need to play somewhere during the building work, and one idea that has been floated is a temporary move to Wembley Stadium.
The home of the England national team goes unused for large spells of the year, though it does host the Football League play-offs, FA and League Cup finals, as well as NFL games, and it seems that both Chelsea and Tottenham are keen to secure deals to play there.
The Telegraph report that Chelsea had made a bid to play at Wembley for the 2017-18 season, which would have seen Spurs pursue a deal for Milton Keynes Dons' Stadium MK - but Daniel Levy and co appear to have responded by matching Chelsea's offer.
The Chelsea bid is stated as being worth £15m-a-year over four seasons - as they need at least three seasons to redevelop Stamford Bridge - and it would appear that Spurs are willing to pay £15m for the 2017-18 season.
That leaves The FA edging towards a ground-share rather than favouring one club over the other, despite Chelsea's initial bid for exclusivity.