Gyokeres left with gruesome gash in head after sickening collision with Gabriel

VIKTOR GYOKERES was left with a nasty head wound after a collision with an Arsenal team-mate in their Champions League clash against Athletic Bilbao

The Swede was on the receiving end of a clash of heads with Gabriel when the pair both jumped for the same ball during an attacking free-kick.

The incident happened in the 30th minute, and left both Gyokeres and Gabriel down on the turf.

However, Gyokeres had his hand placed on the back of his head before medical staff rushed over to treat the gash.

The 27-year-old remained on his knees and head on the grass before he was fashioned with a black headband - reminiscent of former England star Terry Butcher.

As part of the procedure with head injuries, Gyokeres had to temporarily leave the pitch.

He was eventually allowed to return four minutes later.

TNT Sports cameras picked up Gunners boss Mikel Arteta grimacing as his star forward fell to the floor.