Chelsea boss Antonio Conte says Swansea City have been a difficult team to play against since Paul Clement took over.
Prior to the appointment of Clement, who was assistant coach under Carlo Ancelotti at Chelsea and Real Madrid, Swansea looked destined for relegation.
Currently, Swansea are 15th in the league table following a good run of results.
Looking ahead to Saturday's home game against a resurgent Swansea side, Conte stated in Friday's press conference that it will be a difficult game for Chelsea.
"Paul Clement has had a great impact on the Swansea team and I believe it will be a really tough game," Conte said.
Conte confessed that Chelsea not playing in any European competition this season helped ease his work.
"Both myself and my players are fully focused on the next 13 league games as we chase the title," he added.
"The advantage of not playing in Europe was felt more earlier in the season as it gave me time to work on my ideas."
Conte played down Chelsea's FA Cup tie against Manchester United, saying his immediate priorities now are upcoming league games.
"Before we think about the FA Cup game against Man United, we must focus on league games against Swansea and West Ham."
The former Juventus boss went on to express his sadness following Claudio Ranieri's sacking at Leicester.
"I am very sad and disappointed following Claudio Ranieri's dismissal. Ranieri is a good friend and I will call him over the course of the coming days."