Yahoo Sports reports: Cristiano Ronaldo declared "I'm back" and said those "attacking" him should never write him off after making World Cup history in a 5-0 hammering of Uzbekistan on Tuesday in Houston.Ronaldo, the leading scorer in men's international history with 145 goals, has been compared unfavourably with the likes of nemesis Lionel Messi and other star forwards such as Kylian Mbappe, Erling Haaland and Harry Kane so far at the World Cup.