With the game still firmly in the balance at Villa Park, the No.43 on the substitutes' board was the moment when eyebrows were raised and heads were scratched in the Liverpool end.
Having seen Ollie Watkins halve a 2-0 lead early in the second half and the finely poised contest about to enter the final 10 minutes, the arrival of teenager Stefan Bajcetic was not immediately the obvious call for many as Jordan Henderson made way. After all, this was a player whose only previous experience of the Premier League was the final 20 minutes of a 9-0 win over Bournemouth in August.
Within three minutes, however, Jurgen Klopp's masterstroke had been revealed. The 18-year-old made it 3-1 with a remarkably composed finish to settle the result and ensure Liverpool returned to Premier League action after a six-week absence with a hugely important three points.
