Live GAA updates: Westmeath take on Cavan and Armagh and Derry meet in an all-Ulster clash

The All-Ireland Senior Football Championship commences today with a doubleheader of Round One matches. Westmeath, considered a surprise package this summer, takes on Cavan in Mullingar, with throw-in scheduled for 5:00 PM. Later in the evening, at 7:15 PM, Ulster rivals Armagh and Derry will clash in another highly anticipated fixture.

Adding to the day's action, the All-Ireland Under-20 final will see Kerry face Tyrone, also starting at 5:00 PM at Croke Park. Meanwhile, Derry has already secured a significant victory, defeating Kerry 3-24 to 3-19 in the Christy Ring Cup final. This long-awaited win marks Derry's first appearance in the second tier of hurling, the Joe McDonagh Cup, after losing four previous finals, including the last three consecutively.

Team news from Mullingar indicates several changes. Cavan has made four alterations to their lineup since Friday, including two championship debuts for Tynan and Carolan, neither of whom has played a league game. Westmeath has made only one change. Cavan will play against the wind in the first half by choice. The starting lineups for the Westmeath vs. Cavan match have been announced.