Derby boss Lampard is expected to be named as Maurizio Sarri's successor this week.
Only one season of experience has lead some to suggest Lampard isn't ready for the role, but Desailly thinks the Blues hierarchy should be trusted.
"Europa League this year, third position, we were not very pleased about the way Chelsea played this year but how do you want them to go forward and win? There are two crazy teams [in front]: Liverpool and City.
"Sarri, they found him from somewhere, so I'm sure they will find another coach, now that they cannot buy new players, who has a good philosophy to use the players that they have at the moment, from Pedro, to Willian, to [Olivier] Giroud, to have a better tactical setup."