Fabinho admits he knew he may be required to fill-in at centre-back for Liverpool and so began training in that position several weeks ago.
Reds boss Jurgen Klopp has been left short of defenders in recent weeks following injuries suffered by Joe Gomez and Joel Matip.
That led to midfielder Fabinho being asked to play at centre-back alongside Dejan Lovren for the FA Cup tie at Wolves at the start of January.
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Though the Merseysiders would suffer a 2-1 defeat at Molineux, an injury picked up by Lovren meant Fabinho retained his place at the back for their next Premier League game against Brighton.