Collecting Georginio Wijnaldum's inviting through-ball, the Senegal star drove through and fired beyond the reach of Hugo Lloris.
The strike picked up 37 per cent of the total votes cast, while Mane's second effort in the same game secured the runners' up spot.
Completing the top three was Sheyi Ojo's Kop-end curler for the U23s against Tottenham, while Philippe Coutinho's finish in the defeat at Leicester City came in fourth spot.
A magnificent effort from Ben Woodburn for the U23s away at Huddersfield Town took fifth place.
You can watch all five goals again by clicking play on our free video below.