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 on 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 football'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.
Dvorak said surprise visits will be made to get samples from an "entire squad" after March 1, which is when teams have to tell FIFA where they will be training and playing friendlies ahead of the World Cup.
"We will test all teams and all players between the first of March and the kick off, unannounced, at least once," Dvorak said.
Many World Cup teams will be playing warm-ups on March 5, which already falls within the window FIFA can begin its tests.
FIFA used the biological passports during recent Club World Cups and the Confederations Cup last year in Brazil. It will be the first World Cup where FIFA uses the system, which helps detect illegal substances from changes in a player's blood profile. FIFA will also be using a urine profiling technique to detect steroids.
