Antonio Conte has praised Lionel Messi as the kind of talent who emerges only once every half-century after the Barcelona forward registered his 100th Champions League goal en route to eliminating Chelsea from the competition. Messi, who had failed to score in his first eight appearances against the London club, hit three of Barça’s four goals over the two legs and set up Ousmane Dembélé for the other, the secondon Wednesday night, as La Liga’s champions-elect progressed into the quarter-finals.