The Everton manager's job might soon be under threat.
In terms of Everton's departures, those of Idrissa Gana Gueye, Ademola Lookman and Kurt Zouma created arguably the biggest waves.
The losses of Gueye and Zouma, especially, have been cited among the reasons for Everton's poor start, which sees the Toffees occupy 14th place after Saturday's home defeat against Sheffield United.
But it is possible that behind the scenes there is another whose influence is being just as badly missed.
João Pedro Sousa was assistant to Marco Silva at all six of the clubs the Everton boss has managed, winning trophies with Sporting CP and Olympiacos.
But after an approach from Famalicão this summer, Sousa was finally freed from Silva's clutches as he embarked upon a managerial career of his own with one of the Portuguese top-flight's newly-promoted clubs.
The presence of Israeli billionaire Idan Ofer as owner meant that pre-season ambitions were high the Famalicão area of Braga.
But even though a total of 19 players were brought to the club ahead of its return to the highest level, all were either on loan or free transfers (Transfermarkt).
Perhaps surprisingly, the bedding-in period was swift and Famalicão find themselves third in the Liga Nos ahead of Monday evening's trip to Sporting, from which a win would see them top the table after five games unbeaten.
Back on Merseyside, though, the knives are already out for Silva, and it's feasible that another few results like the last once could put paid to the 42-year-old's Everton career.
And if that is to be the case, then losing his trusted right-hand man might prove to be one of Silva's biggest regrets.
Everton fans - How much impact, if any, has Sousa's exit had on your side?
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