Spanish defender Javier Manquillo will wear No.19 for Liverpool.
The 20-year-old completed a loan switch to the Reds from Atletico Madrid earlier this week, becoming Brendan Rodgers' seventh summer recruit so far.
Manquillo may be involved in the friendly against Borussia Dortmund today and his shirt number for the season was confirmed shortly beforehand.
Recent incumbents of the jersey at Anfield include Ryan Babel, Stewart Downing and Fernando Morientes.
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