Club captain Terry called time on his Stamford Bridge career to complete a move to Championship side Aston Villa.
Conte will lead Chelsea as they try to win back-to-back league titles for the first time since 2006 and the Italian is wary of the competition from fellow title contenders Tottenhan Hotspur, Arsenal, Liverpool, Manchester City and Manchester United.
"It was a big deal when Chelsea sold Petr Cech to Arsenal". I personally think that Chelsea is weaker than last reason because Morata is not a proven Premier League forward and losing Deigo Costa will hit them hard. Yet, despite his youth, Chelsea boss Antonio Conte is very confident that the club's new signing will deliver the goods.
'He was a huge personality on and off the pitch and was the mainstay of the team.
"They may not have gelled, might have players coming back from internationals, a few injuries or suspensions".
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'But they have a superb manager in charge.
Conte who won the EPL title in his first season in charge of the Blues is wary of surprises this season but believes that six teams will be vying for the title this season. He was a victor at Juventus where his record was superb. They couldn't have anyone better in charge.
Despite spending close to £150m this season there are still considerable gaps in Chelsea's squad at present, but Conte is sure the club's board are doing everything they can to try and strengthen his squad, with his focus exclusively on his side's clash with the Clarets.
"I have only played two pre-season games, 15 official minutes and a missed penalty [in the Community Shield], and they're already killing me, so I know what's ahead", he added.
Matic chose to call time on his second spell at Stamford Bridge after Chelsea emerged victorious in their chase of ex-Monaco man Tiemoue Bakayoko.
Much was made of the Blues' smaller squad in comparison to their North London opponents and although the likes of Alvaro Morata and Antonio Rudiger did make appearances in the second half many will be hoping for some more signings before the window closes.