Ex-Chelsea striker, Hernan Crespo, says Nigerian winger Victor Moses is playing his best football at the moment under Antonio Conte.
Moses, flourished for Chelsea last season playing as a wing-back and was one of the Chelsea's most important players for the season after spending the previous three seasons out on loan at Liverpool, Stoke City and West Ham.
Crespo who won the English Premier League title in 2006 during his brief two year stint at Chelsea, Ubelieves the Blues will face difficulty retaining the EPL title this season.
"If Conte needs a few players, the best thing is for the club to do that.' Crespo told Daily Mail.
"If you think about Marcos Alonso, Victor Moses, David Luiz – they're playing better than ever. That's Conte's hands.
"It's very difficult to repeat (a title). Conte did a great job – he built a team. Usually, to keep going you need to change a few things."
"I think Manchester United will win the Premier League because Mourinho has never failed in a second season," Crespo said.
"I think the top four will be Manchester United, Manchester City, Chelsea and Arsenal. The best managers in the world are in the Premier League now. If you think about Antonio Conte, Pep Guardiola, Jurgen Klopp and Mourinho – it is a very good championship now.
Conte has been reportedly frustrated agitating for more new players in his squad despite allowing seven first team players leave the club and spending £130m this summer on Tiemoue Bakayoko, Antonio Rudiger, Alvaro Morata and Willy Caballero.
Chelsea begin their title defence against Burnley on Saturday and Conte is concerned that his squad is not strong enough and wants more arrivals before the transfer window closes.