The thousands of Welsh supporters who have brought their nation's famed singing, not to mention plenty of plastic dragons, to a major tournament after a wait of more half a century are steeling themselves to hit the heights - or rock bottom - today.Currently in second place in Euro 2016 group B with three points, Wales could finish either top or bottom of their section, depending on their own result against Russia here and England's against Slovakia.If they beat the Russians, who have only one point, and neighbours England fail to win, Chris Coleman's side would be proud group winners, qualifying for a round of 16 match in the Parc des Princes next Saturday against a third-placed team. At the other extreme, defeat, and at least a point for Slovakia, would leave them fourth.