Chelsea boss Mauricio Pochettino expects to know more about Christopher Nkunku's injury later today.

The France striker was forced off in the first-half of their 1-1 draw with preseason opponents Borussia Dortmund yesterday. Nkunku left the pitch with ice being applied to his knee.

Pochettino late said: "The doctors are checking him.

"He had the chance to score but he feels something in his knee.

"Hopefully it is not a big issue and that he can be quick with the team. We need a few days to assess him and until we get back to London it is difficult to know.

"Always we take some risks because the pitch is not perfect as they are using it for different sports and that is sometimes the risk of the tour.

"I think it was a bit unlucky in the situation but we cannot complain about the pitch and to blame the pitch for why he suffered the injury. For me, it was bad luck."