VIDEO: Row mars end of Ulster U21 semi-final between Donegal and Tyrone

Donegal and Tyrone could be in a bit of bother after the end of tonight's Ulster U21 football semi-final.

Tyrone booked their place in yet another Ulster U21 football final after an impressive four-point win over a 13-man-Donegal side in Celtic Park by 1-15 to 2-8, but it's an incident in the closing stages that could have major implications for both teams. Donegal led by 0-6 to 0-4 at the break, but two reds cards after the short whistle for Stephen McMenamin and Bruce Waldron meant Declan Bonner's side faced an uphill battle. Tyrone powered to an impressive win where they will face Monaghan in the provincial final after they beat Armagh by 2-16 to 0-9 However at the close of the game, the Tyrone-Donegal match descended into ugly scenes as both sides engaged in a row. Head to 2.50 in this clip to see the grainy footage of the row, that doesn't look as if it was too heated, but Ulster GAA are sure to investigate. https://twitter.com/DOCSPORT3/status/715272621336735744