Why to watch: Wales' Gareth Bale. England begins its pursuit of its first major title in a half-century. Russia seeks to prove it can contend at its home World Cup in two years. The U.S. looks to advance to the knockout stage.
Why to watch: Spain opens defense of its title. Sweden's Zlatan Ibrahimovic. Belgium tries to prove it deserves its status as a favorite when it faces Italy in the Euro's best group stage match.