Bayern Munich striker Robert Lewandowski and Nice midfielder Jean Michael Seri are reportedly both put off by the prospect of joining Chelsea until the future of manager Antonio Conte has been resolved.
Per Matt Hughes in The Times, Conte is widely expected to be sacked, but there continues to be disagreement over a severance package, and Seri's representatives have put talks on hold with the Blues until it is clear who the manager will be next term.
Hughes added Lewandowski, 29, is also wary of moving to Stamford Bridge while the managerial situation is so unclear, although Bayern are confident he will stay at the Allianz Arena anyway.
Conte, 48, has won the Premier League and the FA Cup in his two seasons with Chelsea, but it has long been expected he would depart this summer, not least due to a prolonged dispute with the club's board over transfer policy, per the Daily Mail's Matt Barlow.
Given the impressive job Sarri has done over the last three seasons at Napoli—installing an attractive brand of football and making them competitive in Serie A—there are likely a number of players who would be keen to work under him.
And that could include both Lewandowski and Seri, but they are clearly not ready to commit to a move to Chelsea until they know who will be in charge.
The west London outfit face a huge challenge next term to return to competitiveness in the Premier League having finished fifth last season, 30 points behind champions Manchester City.
Adding Lewandowski and 26-year-old Seri would be a huge boost. The Poland captain would add goals that were largely lacking last season due to Alvaro Morata's drop in form after the start of the campaign.
Meanwhile, Seri's dynamism, distribution and creativity would give Chelsea's midfield a new edge.
If Chelsea miss out on one or both of them due to their inability to resolve their managerial situation they will only have themselves to blame.