Winger Cliff, member of our double-winning side of 1960-61 and a hero at the Lane, will be at the Millennium Stadium for the Euro 2004 play-off second leg against Russia. The sides drew 0-0 in Saturday's first leg.
Cliff, at Spurs from 1957-68, is being honoured in Cardiff tonight with a number of Welsh players for winning more than 50 caps for his country.
He was in the Welsh squad that played in the World Cup Finals in Sweden in 1958 - including a narrow defeat against the great Brazil and Pele - the last time Wales played in a major finals.
They are now a win away from the Euro 2004 Finals in Portugal and Cliff is desperate for Mark Hughes' men to get there.
Hughes is one of a number of Welsh players to have missed out on football's biggest stages - the World Cup and European Championships - alongside the likes of Joey Jones, Leighton James, Ian Rush and Neville Southall.
Cliff said: "So many great players have missed out and I was very fortunate to have that experience to play in a European or World Cup Finals.
"It was my greatest honour to play for Wales and as far as I'm concerned that's the biggest honour of all.
"It would be a great shame if these players didn't make it to a major finals and it would be a huge advantage to their careers if they do. I'm sure they can get that platform that their talent deserves.
"They've done tremendously well to get where they are and this will be the biggest game of their lives
"It's a great chance to get into the European Championships. We had to qualify as well, they were massive games and this must be one of the biggest, if not the biggest, game since those days.
"I think they've got every chance of doing it. They've done the hardest part but they've now got the fantastic support of the Millennium Stadium and that will be an extra man. I think they will do it and I'll be there to see it."
Spurs legend and Welsh great Cliff Jones is backing Wales to make it to Euro 2004 tonight - he says it would be a great shame if Simon Davies and his current team-mates joined the list of Welsh players to miss out on major finals.