The bookmakers are finding it tricky to get a handle on who should be favourite in Group B's opening encounter.
Several bookmakers have both teams as the same price to win but new Paddy Power customers need not worry about this tricky dilemma with the Irish bookmaker offering a massive 9/1 (10.0) about Wales kicking off their Euro 2016 campagin with a victory.
To avail of this price simply open an account through the links provided and back Wales at the usual price shown on site. If they are able to win the game then the returns will be topped up to the enhanced value at the final whistle.
Chris Coleman's side picked up seven wins from 10 games in qualifying and while their warm up friendlies didn't go to plan, the absence of Gareth Bale and several other key players means that those results could have very little bearing on their chances against Slovakia.
After overcoming his injury complaint, Bale should return to the starting line-up in Bordeaux and after firing seven goals in qualification the Real Madrid frontman looks set to star for his country again.
Jan Kozak's side come into this game in decent form, most notably against an experimental German side but their failure to break down both Northern Ireland and Latvia in recent freindlies will give Wales backers plenty of belief that Coleman's men can start their European journey off in the best possible way.
While they are far from a sure thing, anyone who is considering investing in Wales will surely be tempted by the 9/1 (10.0) on offer from Paddy Power ahead of kick off.