So who would have thought it? After Thursday's last-gasp winner from Daniel Sturridge, it looked like England would top the group, with Wales' future in the competition hanging in the balance.
90 minutes later and Wales sit proudly atop Group B after steamrollering Russia 3-0, while England - with Roy Hodgson criticised for making six changes to a winning side - failed to break down a bus-parking Slovakia side, limping to a 0-0 draw to finish in second place.
Predictably, Twitter was its usual entertaining self - here are the highlights (and lowlights) of the final game of the group stage for England and Wales.
Wales fans bask in the glory
Someone had to do it
Joe Ledley shows off some serious moves
Obviously a brilliant night for Wales, but great to see plucky underdogs England squeeze through as well.— Tom Williams (@tomwfootball) June 20, 2016
Oh, well played, well played
The verdict from France - England's likely quarter-final opponents
Can't say we blame him
Changed your mind on this one Roy?
Good job England dropped their captain & most creative player...
Jack Wilshere's game by numbers:— Busby MUFC (@SirMatthewBusby) June 20, 2016
8 misplaced passes
1 tackle won
0 chances created
England's best midfielder
A sobering judgement
Wales have a world-class player, a proven gameplan (that plays to his and others' strengths) and a powerful mentality. England, sadly, don't— Oliver Kay (@OliverKayTimes) June 20, 2016
Take That, England
The way England are playing they have no chance to win euro 2016.— Howard Donald (@HowardDonald) June 20, 2016
If they do I will wear a pink tutu and stick a football up my arse