Sarri stressed that his side can still improve despite the confidence they have shown as it is only the beginning of the campaign, but feels closing the gap with Manchester City in just one season will be tough.
Chelsea were drawn against PAOK, BATE Borisov of Belarus and Hungarian outfit MOL Vidi in Friday's Europa League draw and Sarri says Loftus-Cheek will have a big part to play when the Blues' busy schedule kicks in.
Sarri had warned before the opening game of the league campaign that his side would face a hard start as he attempted to implement a very different approach to that employed by Conte.
Maurizio Sarri is unlikely to change the winning formula as Chelsea host an undefeated Bournemouth side at Stamford Bridge on Saturday.More news: Serena Williams ditches catsuit for ‘Tutu’ dress
"He has great qualities from a physical point of view, and technical point of view". I think he needs to improve from the tactical point of view.
"He will be very important and very useful for us".
Chelsea remained in the ascendancy as the first half progressed with Willian dragging a shot marginally wide of Asmir Begovic's post, but the best opportunity of the opening 45 minutes went to the visitors. "But in this kind of match, usually you can win in the last 20-25 minutes, so I was always confident".
Later in the first half, he allowed Wilson to control and lay the ball off before drifting away from the striker as he moved unmarked into the penalty area.
However, his apparent inability to make himself useful or unsafe in other ways is not what Chelsea had in mind when they set a club transfer record to prise him from Real Madrid last summer. I didn't know him or the players, but I knew the situation. "At the moment, we crossed three, four, five times, so I thought Giroud, in that moment, was better".