Chelsea manager Jose Mourinho's pursuit of Manchester United's unsettled striker Wayne Rooney has added spice to the first big Premier League match of the season when the title rivals clash at Old Trafford on Monday.
The west London club have already tabled two bids for the England forward and have not ruled out making a third, despite new United boss David Moyes's steadfast refusal to sell.
"We have Plans B and C," Mourinho said ahead of Wednesday's home game against Aston Villa, which they won 2-1 thanks to a second-half header from Serbian Branislav Ivanovic.
"Don't ask me names because it's difficult to speak about players from other clubs. We have the conditions to try to improve our team by bringing in one more player and we are going to try that till the end."
The Blues are keen to add to their striking options of Fernando Torres, Romelu Lukaku and Demba Ba but United do not want to sell to a Premier League title challenger despite the form of Robin van Persie and Danny Welbeck, who each scored twice in an opening 4-1 win at Swansea City on Saturday.
Monday's match between two of the Premier League's biggest rivals sees David Moyes in charge of United at home in the league for the first time since replacing Alex Ferguson, a man whose absence the returning Mourinho said would be strange.
"It will be difficult for me, and I think all managers, to go to Old Trafford and play against Manchester United without this mythical figure waiting for us," he recently told Sky Sports.