Chelsea boss Jose Mourinho has refused to be drawn into speculation over whether or not he will sign John Stones or Baba Rahman.
The Blues desperately need a new left-back after the departure of Filipe Luis who returned to Atletico Madrid.
But Mourinho says he will not speak about players who belong to other clubs.
"I don’t speak about players from other clubs, especially now competition starts," Mourinho said on Friday.
"It starts for us and Arsenal now, and next week for everyone."
Asked about how strange it will be to face Petr Cech, the Portuguese said: "It is no problem for me. I did it already: Inter versus Chelsea."