Chelsea chairman Bruce Buck has defended their record of sacking managers.

"A lot of people talk about continuity in managers and I think that we as a board and Roman would agree that continuity is a real plus," Buck told The Blues' official website.

"But we don't think it's continuity for continuity's sake and it has to be with the right person at the right time.

"Everyone points to Arsene Wenger at Arsenal and Sir Alex Ferguson at Manchester United as situations where continuity has worked very well. But football has moved on and I think it was four. Five years before Alex Ferguson really won anything at Manchester United.

"I think the way dynamics of football are today, that's not really acceptable. When Manchester United does finally change coaches, and it will at some point, I don't think they will have the luxury of waiting four, five, six or seven years for its new manager to win a trophy.

"So I think times are different from when Wenger and Ferguson first started their jobs. Everyone looks at continuity as helpful and as relevant but there's not a lot of it because of the nature of football.

"So yes, continuity is important but it has to be with the right person and it's very hard to achieve."