"The situation is that Drinkwater for me is not suitable for a midfield with two midfielders", Sarri said.
Moses has made six appearances for the Blues across all competitions this season, while Drinkwater's only outing came in the Community Shield loss to Manchester City in early August.
The 27-year old has less than two years to run on his current contract at the club and Chelsea need to make a decision before the end of the season as they may prefer to cash in on their prized asset rather than allowing him to leave on a free transfer in 2020.
However, footballlive.ng can report that, while Sarri has stopped short of saying anything about the next line of action for Moses, despite the gaffer speaking at length over one of the winger's rivals, Ruben Loftus-Cheek.
"They have to improve but their characteristics are a little bit different".
"We have used 26 players in official matches [in all competitions] this season so the rotation at the moment is this, but I don't know in the future", he said.
Jason Puncheon was afforded a rare opportunity in the Crystal Palace first team on Wednesday night, starting against Middlesbrough as the Eagles fell to a League Cup defeat.
"I have to look also to the minutes in the national teams".
"I don't want to think about the record, only to think about the match and to gain points. Of course if you look to December, January, you'll need to change also for the Premier League, because there will be matches every three days".
"I have to think to improve my players. Because the players were able to win without a very good level of tactical organisation". It is normal, if you want to play with continuity in a team like this. "I think it is better to stay here and fight for minutes on the pitch [after a few loan moves]".
Former Liverpool FC defender Lawrenson is backing Chelsea FC to edge to a 2-0 win against Palace at Stamford Bridge on Sunday evening.