Mr Tandy was a trainee with Manchester City at the time when Barton – who was a senior player and emerging star – attacked him during the 2004 Christmas party.

Mr Tandy claims he suffered a “major psychiatric deterioration”.

Today, the courts confirmed that Barton has been served with a claim from Jordan Spencer and will next be dealt with on November 7 at Liverpool County Court.

Barton, 25, attacked Mr Spencer, then aged 16, in the early hours of December 27 outside a Liverpool city centre McDonald’s.

The player, who admitted the offence and later admitted another attack on former colleague Ousmane Dabo, was jailed for six months for the assault – which he launched after drinking several pints and bottles of beer.

Last month he was released after serving 74 days in jail.

He is currently serving a suspended sentence for the training ground bust-up with team-mate Dabo, 31, who is now playing with Lazio in Italy.

As part of his punishment, Barton was ordered to pay £2,500 compensation to Mr Spencer, whose teeth were smashed in the attack.

But the 17-year-old felt the sum was insufficient and lodged the claim for damages.

It is thought his legal team will argue the boy was seriously affected by the ordeal and the compensation ordered at Crown Court was not commensurate with his suffering.

The next hearing will be before a judge who will consider if Barton should pay more money.

A county court spokesman said Barton’s camp have not yet responded to the claim.