Colombian-born Liverpool footballer Luis Díaz has begged for his father's kidnappers to free him immediately and "end this painful wait".
Both of Díaz's parents were seized at gunpoint in his hometown of Barrancas by left-wing guerrillas of the National Liberation Army (ELN) on 28 October.
While his mother was found, his father is still missing.
Diaz scored a late equaliser against Luton on Sunday, lifting his shirt to reveal the words "freedom for papa".
"Every second, every minute our anxiety grows," Diaz said in a statement released on Sunday.
"My mother, my brothers and I are desperate, anxious and have no words to describe what we are feeling.