OTB Philidor Defence

I avoided the Alekhine Defence, thinking my opponent probably knew it much better than me, and played into a Philidor Defence.  Think he may have missed an opportunity to go ahead a pawn with move 7 - which I also missed until too late.  Ulimately though black didn't need to relinquish the g pawn I think - once this was captured the end game looked winning for white.