The key All-Ireland semi-final battlegrounds 

Gary Mohan and Darren Hughes started in midfield vs Armagh. They are old-school fetchers, but McCarthy’s mobility will pose a stiff challenge.

PUNCH POWER: Karl O'Connell of Monaghan. Pic: Harry Murphy/Sportsfile

How will Dublin and Monaghan deal with deep punch power?

Croke Park founds its full voice against Mayo. At various points, Dublin fans on Hill 16 had reason to roar. Colm Basquel’s second goal came at that end. When Jack McCaffrey came on, his reception was deafening. For the final quarter, it was a lyrical mix of Alive Alive-O and Cheerio, Cheerio.