Barcelona's Gerard Pique out for at least two months after serious knee injury

Sergi Roberto also out after tearing a muscle in his thigh

Barcelona's defender Gerard Pique, centre, sustained a knee injury during the match against Atletico Madrid at the Wanda Metropolitano Stadium on Saturday. EPA

Barcelona's Gerard Pique leaves the field after suffering a knee injury against Atletico Madrid. EPA

Diego Simeone, manager of Atletico de Madrid, looks on as Gerard Pique walks off after picking up an injury. Getty

Gerard Pique is out for at least two months due to a knee injury. Getty

Barcelona's Gerard Pique suffered a grade 3 sprain in his knee. EPA

Barcelona's Gerard Pique, left, reacts after getting injured in a challenge with Atletico Madrid's Angel Correa. AP

Gerard Pique joins a growing injured list at Barca. AFP

Barcelona's Gerard Pique, bottom, reacts after getting injured. AP

Barcelona's Gerard Pique has sustained a serious knee injury, the club confirmed on Sunday, with the defender expected to be out for at least two months.

Pique cried as he hobbled off the pitch during Barca's 1-0 defeat by Atletico Madrid in La Liga on Saturday following a collision with Angel Correa.

"Tests have shown that he has a grade 3 sprain in the internal lateral ligament and partial injury to the anterior cruciate ligament in his right knee," said Barcelona in a statement.

The club also confirmed that Sergi Roberto, who can play right back or central midfield, will be out for two months after tearing a muscle in his thigh.

There was no official estimate for Pique's return but reports in the Spanish press have suggested he could be out for anything between two and six months.

Pique's absence leaves Barca with Clement Lenglet as their one fit central defender, given Samuel Umtiti and Ronald Araujo are also out injured.

Frenkie de Jong has occasionally dropped into defence in recent weeks but the situation is far from ideal for Ronald Koeman, whose side slipped to their third league loss of the season against Atletico.

Barca sit 10th in La Liga but have fared better in the Champions League, sitting top of Group G with nine points out of nine ahead of Tuesday's game away at Dynamo Kiev.