Unai Emery says Jose Mourinho's sacking as Manchester United manager came as a surprise.
The Spaniard added that the news did not bode well for other coaches.
Speaking before Wednesday's EFL Cup quarter-final against Tottenham, Emery said: "The only thing I can say to you is that it's a surprise for me and not good news, because when one coach finishes his work like that, it's not good for coaches.
"My focus is only on our way, our work. We have a lot of work to do to improve and also find a solution in every match with our players. My focus is on the big derby tomorrow, the north London derby, and that's the focus of the players as well. Only that."