New York, June 10 -- Five-time world champions Brazil begin their World Cup campaign against Morocco on Saturday, but there remains considerable uncertainty over how head coach Carlo Ancelotti will address the defensive concerns facing his side.

Ironically, for a nation long celebrated for its attacking brilliance, Brazil's backline emerged as the main talking point during Tuesday's press conference. With questions lingering over personnel and balance in defence, Ancelotti has limited options.

Potential replacements Roger Ibanez and Danilo have not featured regularly in the role under consideration in recent times, with both players primarily operating as centre-backs or full-backs for their respective clubs.

"We are working hard to ge...