Atletico Madrid goalkeeper Jan Oblak dislocated his left shoulder and will need to undergo surgery, the Spanish club said Tuesday.

The 23-year-old picked up the injury during Atletico's 3-0 defeat at Villarreal on Monday, which saw the club slip to sixth place in the Spanish league.

Slovenia international Oblak, an integral part of the team since signing in July 2014 from Portuguese side Benfica, was replaced by Miguel Angel Moya in the 40th minute of the match.

"He will have to undergo surgery in the coming days," Atletico said in a statement.

The club did not say how long the player would be sidelined but Spanish media said he would be out for three or four months.

Atletico's Portuguese international midfielder Tiago, 35, also limped off during the first half at El Madrigal with discomfort in his right knee and was replaced by Saul Niguez.

Uruguayan centre-back Jose Maria Gimenez, 21, injured his left foot during training and also underwent medical tests on Tuesday, the club said in another statement.