Real Madrid midfielder Casemiro has admitted that his team 'are not playing well'.

Los Blancos returned to winning ways in the Champions League on Tuesday night with a 2-1 success over Viktoria Plzen, but have lost four of their last six matches in all competitions.

Next up for the European champions is a trip to Barcelona in La Liga this weekend, and a defeat would surely spell the end of Julen Lopetegui's time in charge of the club.

Casemiro is among those to be criticised for some below-par performances this season, and the Brazilian has accepted that Madrid are currently having some issues.

"You have to be honest, we're not playing well," Casemiro told reporters. "But you have to trust these players and the coach. We are not in a good run, but we have to work and overcome this situation."

Despite a difficult run, Madrid are only four points off La Liga leaders Barcelona entering this weekend's clash at Camp Nou.