With exciting football and vibrant fans lighting up cities across Germany, Euro 2024 has thrilled even though the European game's biggest stars have failed to take the tournament by storm. Between injury struggles, shaky form and bad luck, many of football's leading lights have underwhelmed in the group phase. Portugal striker Cristiano Ronaldo, playing at a record sixth Euros, is yet to strike in three appearances -- if he manages to, the 39-year-old will become the oldest ever goalscorer at the tournament.