Jon Hiles was on the island of Zakynthos, also known as Zante
A student faces an extradition hearing over the death of an 18-year-old roller hockey player on holiday in Greece.
Andrew Symeou, 19, was arrested over the death of Jonathon Hiles from Cardiff, who died after an incident at a nightclub on Zakynthos in July 2007.
The Bournemouth University student, of Enfield, north London, was remanded on bail by Westminster magistrates.
He was bailed to return to the same court on 7 July, when a decision will be taken on extraditing him to Greece.
The student was arrested by the Metropolitan Police extradition unit on suspicion of manslaughter at his family home on Thursday night after a European arrest warrant was issued by Greek authorities.
His passport was also seized by police.
Mr Hiles, from Llandaff North, Cardiff, was with friends on Zakynthos when he was injured.
He was taken to hospital in Athens where he died on 22 July, 2007.
Mr Symeou was given bail after his mother, Helen, pledged surety of £20,000 for him.
Under the bail conditions he must reside at the family home until he next appears in court.
Mr Hiles had represented the Great Britain roller hockey team at various age groups and also played ice hockey for Cardiff Devils' junior team.