While it remains to be seen whether Chelsea are able to strengthen in their three preferred areas in January, they return to Premier League action when they entertain high-flying Brentford on Saturday.
The fixture is Rosenior’s first league game in charge following his arrival from Ligue 1 side Strasbourg, having guided Chelsea to the FA Cup victory over Charlton Athletic last Saturday before the narrow Carabao Cup reverse against Arsenal on Wednesday.
Speaking ahead of what he expects to be a stern test against Brentford - who are currently fifth and two points above the eighth-placed Blues - Rosenior said in his pre-match press conference: “They are a proper team in every phase of the game.
“All 11 players are willing to defend. They're a very good team on set-plays, whether that's from long throws, wide free-kicks or corners. They're a team with no ego, in the most positive terms. They work really hard for each other, they're very well organised, as every team in the Premier League is.
“We prepare for everything. There's no stone left unturned, not just from me, but from all of my staff. I'm aware of the threats that Brentford bring, and I'm sure they're aware of the ones that we do too. We know we will have to be at a really good level.”