Spanish officials have confirmed there was nothing abnormal with Lionel Messi's doping test after the Argentine expressed his frustration about being singled out.
Messi was one of five players picked by the Spanish Agency for Protection of Health in Sport (AEPSAD) to undergo anti-doping tests on Monday.
Read: Messi So Good, He Is Double-Checked For Doping
However, the 27-year-old was the only one required to give blood and urine samples to which he posted a sarcastic message on his Instagram account.
However, the AEPSAD confirmed that in accordance with UEFA rules it requires that one out of every five players tested undergo both urine and blood tests.
According to Marca, the protocol was established in Spain for the 2013/14 season.
Andres Iniesta, Claudio Bravo, Ivan Rakitic and Jordi Alba were the other players who were only tested once.
It is not the first time the Argentine has expressed his frustration at being singled out for anti-doping controls.
During the World Cup he posted on social media sites that he was unable to celebrate Argentina's qualification to the final due to having to pass anti-doping tests.
Do you think officials want to make extra-sure that Messi doesn't dope? Have your say in the comment section below.
