Robbie Hughes' mother Maggie spoke to London Tonight after his attackers were found guilty of assault in Crete.
Robbie, the former Oxford United footballer, was left with brain damage after being attacked while on holiday.
Maggie said after the verdict: "There's no anger, there's no sadness. We're all celebrating. It's just a wonderful feeling."
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The killer's solicitor has written to police challenging them to prove his confession.
Tottenham last won the league back in 1961 - but they are feeling confident after a string of great performances this year so far.
Crimestoppers are offering the reward as police say they are becoming increasingly concerned at the viciousness of the assaults.