Newcastle are chasing Bournemouth striker Callum Wilson.
The Sun says Newcastle relinquished top spot to Brighton after a 1-0 defeat to Sheffield Wednesday on Boxing Day.
Even top scorer Dwight Gayle, who has netted 17 goals so far this season, could not ensure they stay at the summit.
And Benitez wants Wilson to ensure they push on and secure a swift return to the Premier League.
The former Liverpool boss is said to want January reinforcements after the rare defeat to Wednesday at St James' Park.
Wilson is seen as an attainable target having scored just three goals for Bournemouth since returning from a long-term injury.