Everton captain Seamus Coleman was carried off on a stretcher just before half time in his side's clash against relegation rivals Leicester.
The 34-year-old was challenged by Boubakary Soumare, with the Leicester player getting a yellow card.
As he was taken off on the stretcher Coleman was still attempting to gee up the Everton supporters.
Speaking on BBC Radio Five Live, former Manchester City player Michael Brown expressed concern that Coleman may have suffered an anterior cruciate ligament injury.
Brown said: 'It doesn't look good [for Coleman].