FIFA is expected to conduct surprise doping tests of all World Cup players at least once beginning in March, setting up biological passports to determine possible irregularities in blood and urine samples.

FIFA chief medical officer Jiri Dvorak said Saturday all teams and players should be tested unannounced between March 1 and the World Cup opener in June.

In a news conference, he also said FIFA's medical staff will decide before games whether drinking breaks will be used during the World Cup in Brazil.

He said soccer's governing body is not overly concerned with the heat during matches in the jungle city of Manaus, which will host matches by England, Italy, Portugal and the United States.