Ferdinand has revealed the controversy has affected his everyday life.
Ferdinand told The Sun: "Of course, it's been strenuous — but it's football as usual as far as I'm concerned.
"All week I've been focusing on nothing other than the game at Spurs on Sunday."
But there is little doubt the pressure will intensify later today when he submits his evidence.
An insider confirmed: "John Terry has given his version of events — let's just say it bears no resemblance to what Anton recalls."
The source added: "Once Anton hands his version of events to the FA, they'll have no option but to quiz every player who may have seen or heard what actually happened."