Chelsea Boss Jose Mourinho has told midfielders Juan Mata and Michael Essien that his door is open if the duo want to leave.
Mata was furious after being substituted just after the 50 minute mark, in Chelsea's 3-0 win over Southampton on New Year's Day.
The Spain international, who has started only nine Barclays Premier League games this campaign, had to be calmed down by Michael Essien, who was on the bench at the time.
Mourinho does not want to lose the Spaniard in the transfer window, and he says he would be happy to talk to the player if he is unhappy.
"I want to keep him. I don't want him to go. That is my opinion, my wish, but my door is open," the Chelsea manager said.
"The club's door is open too so when a player wants to speak to us we are there waiting for them.
"If you are asking do you want the club to sell him? I don't want to."
Essien's future at Stamford Bridge was thrown into doubt when his agent suggested that he could leave the London club due to a lack of playing time.
Mourinho, stressed he wanted to keep the player, but admitted that he could not offer the Ghanaian guaranteed first-team football.
"I offer nobody - not Michael, not nobody (guaranteed playing time)," the Portuguese said.
"I understand that players think about national team, the World Cup and playing regularly, but my players have to think of the team before the players. Michael knows that perfectly."