Celtic fans will be keeping an eye on events at major international tournaments this summer as they wait for pre-season to commence at Lennoxtown. As everyone is acutely aware, Callum McGregor, Anthony Ralston, James Forrest, and Greg Taylor are involved at EURO 2024 with Scotland, though they aren’t the only ones featuring for their country on the big stage. Cameron Carter-Vickers and Alistair Johnston are set to be in action for the United States and Canada at Copa America, with the latter set to feature in the competition opener against Argentina tomorrow in the early hours (01.00), live on…