Alexis Sanchez during Chile’s recent defeat to Paraguay (Getty)

Arsenal have serious concerns about the fitness of Alexis Sanchez after their talisman picked up an injury while on international duty.

The 28-year-old hurt his ankle during a Chile training session with local media reporting that he left with an ice pack around the problem area.

The Gunners will get a better idea of the extent of the injury tomorrow evening when Chile play Bolivia.

Sanchez is thought to be a doubt for the match, although Chile’s medical staff are reportedly hoping he will be able to push through the pain barrier.

Alexis Sanchez has only just returned to action (Getty)

Chile will be tempted to risk Sanchez for the match in La Paz in the awareness that their World Cup qualification is far from assured. They currently occupy the fourth qualifying spot in the South America group but only on goal difference ahead of Argentina who are in the fifth-place play-off position. Paraguay and Ecuador are just two points behind.

The news of the injury will be a serious concern to Arsenal who only managed to welcome Sanchez back to action just before the international break. The former Barcelona player featured in the 4-0 defeat to Liverpool.

Arsenal 2017/18 fixtures

Huddersfield (A) - Sun May 13

Following a shaky start to the season for Arsene Wenger’s side, the loss of any player at this time will be a blow.

The Gunners take on Bournemouth when the Premier League resumes at the weekend.

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